Do you need to know, when is the best time to go to Baja California? Then you should take a look here, what weather you can expect there during the year.
Baja California is part of Mexico. The climate of Mexico is varied, somewhere it is tropical, somewhere desert. In the north you can expect experiences lower temperatures during winter and less rains during the year. In the south the temperatures are quite constant year round. But you should alway consider the elevation of the place, where you are planning to go. Most of the country has a rainy season from June to October.
When speaking about the usual weather in this area, the information is relevant for example for these popular places: Bahia de Los Angeles, Baja California, Baja California Sur, Cabo San Lucas, Camalu, Canyon de Guadalupe, Colonet, El Rosario, Ensenada, Guadalupe Island, Guerrero Negro, La Paz, Loreto, Los Algodones, Los Barriles, Mexicali, Mulegé, Playas de Rosarito, Puerto Nuevo, San Felipe, San Ignacio, San José del Cabo, Santa Rosalia, Tecate, Tijuana, Todos Santos, Valle de Guadalupe.
Let's look now what weather you can expect in the area around Tijuana and in many other cities. The warmest month here is July, the average maximum temperature is 28.5 ℃ (83.3 ℉). The average minimum temperature in this month is 17.6 ℃ (63.68 ℉). The coldest month here is March, the average maximum temperature is 20.2 ℃ (68.36 ℉). The average minimum temperature in this month is 9.8 ℃ (49.64 ℉). The most rainy month here is March, the average number of rainy days is 8.2. The least rainy month here is August, the average number of rainy days is 0.3. 
When travelling around Baja California, always consider the altitude of the the place as well. We should remind you, that the highest point in Mexico is Volcan Pico de Orizaba (5636 m) and the lowest point is Laguna Salada (-10 m). So there are huge differences in altitudes in this country and the weather is very different in them therefore. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in Baja California in January is this: The average highest temperature in Baja California in January is 20.4 ℃ (68.72 ℉). The average lowest temperature is 7.5 ℃ (45.5 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 20.45 ℃ (68.81 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 20.8 ℃ (69.44 ℉). The average number of rainy days in January is 5.9. The average rainfall is 42 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:02 (hours and minutes), in the middle of the month 10:14 and at the end of the month 10:35.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Baja California in February is this: The average highest temperature in Baja California in February is 21.2 ℃ (70.16 ℉). The average lowest temperature is 8.8 ℃ (47.84 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 20.8 ℃ (69.44 ℉). At the end of February you can expect lower temperatures, the average highest temperature is around 20.7 ℃ (69.26 ℉). The average number of rainy days in February is 5.4. The average rainfall is 41.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:35 (hours and minutes), in the middle of the month 11:00 and at the end of the month 11:29.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Baja California in March is this: The average highest temperature in Baja California in March is 20.2 ℃ (68.36 ℉). The average lowest temperature is 9.8 ℃ (49.64 ℉). At the beginning of March you can expect higher temperatures, the average highest temperature is around 20.7 ℃ (69.26 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 20.75 ℃ (69.35 ℉). The average number of rainy days in March is 8.2. The average rainfall is 62.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:29 (hours and minutes), in the middle of the month 11:59 and at the end of the month 12:29.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Baja California in April is this: The average highest temperature in Baja California in April is 21.3 ℃ (70.34 ℉). The average lowest temperature is 10.8 ℃ (51.44 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 20.75 ℃ (69.35 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 22.45 ℃ (72.41 ℉). The average number of rainy days in April is 3.8. The average rainfall is 19.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:29 (hours and minutes), in the middle of the month 12:58 and at the end of the month 13:26.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Baja California in May is this: The average highest temperature in Baja California in May is 23.6 ℃ (74.48 ℉). The average lowest temperature is 13.4 ℃ (56.12 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 22.45 ℃ (72.41 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 24.95 ℃ (76.91 ℉). The average number of rainy days in May is 1.1. The average rainfall is 3.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:26 (hours and minutes), in the middle of the month 13:49 and at the end of the month 14:07.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Baja California in June is this: The average highest temperature in Baja California in June is 26.3 ℃ (79.34 ℉). The average lowest temperature is 15.7 ℃ (60.26 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 24.95 ℃ (76.91 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 27.4 ℃ (81.32 ℉). The average number of rainy days in June is 0.6. The average rainfall is 0.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:07 (hours and minutes), in the middle of the month 14:16 and at the end of the month 14:16.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Baja California in July is this: The average highest temperature in Baja California in July is 28.5 ℃ (83.3 ℉). The average lowest temperature is 17.6 ℃ (63.68 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 27.4 ℃ (81.32 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 28.15 ℃ (82.67 ℉). The average number of rainy days in July is 0.5. The average rainfall is 0.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:16 (hours and minutes), in the middle of the month 14:06 and at the end of the month 13:48.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Baja California in August is this: The average highest temperature in Baja California in August is 27.8 ℃ (82.04 ℉). The average lowest temperature is 17.7 ℃ (63.86 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 28.15 ℃ (82.67 ℉). At the end of August you can expect higher temperatures, the average highest temperature is around 27.9 ℃ (82.22 ℉). The average number of rainy days in August is 0.3. The average rainfall is 0.4 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:48 (hours and minutes), in the middle of the month 13:24 and at the end of the month 12:57.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Baja California in September is this: The average highest temperature in Baja California in September is 28 ℃ (82.4 ℉). The average lowest temperature is 17 ℃ (62.6 ℉). At the beginning of September you can expect lower temperatures, the average highest temperature is around 27.9 ℃ (82.22 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 26.9 ℃ (80.42 ℉). The average number of rainy days in September is 1.1. The average rainfall is 5.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:57 (hours and minutes), in the middle of the month 12:28 and at the end of the month 11:59.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Baja California in October is this: The average highest temperature in Baja California in October is 25.8 ℃ (78.44 ℉). The average lowest temperature is 13.2 ℃ (55.76 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 26.9 ℃ (80.42 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 24.65 ℃ (76.37 ℉). The average number of rainy days in October is 2.6. The average rainfall is 9.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:59 (hours and minutes), in the middle of the month 11:29 and at the end of the month 11:01.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Baja California in November is this: The average highest temperature in Baja California in November is 23.5 ℃ (74.3 ℉). The average lowest temperature is 10 ℃ (50 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 24.65 ℃ (76.37 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 22 ℃ (71.6 ℉). The average number of rainy days in November is 3.8. The average rainfall is 31.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:01 (hours and minutes), in the middle of the month 10:35 and at the end of the month 10:15.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Baja California in December is this: The average highest temperature in Baja California in December is 20.5 ℃ (68.9 ℉). The average lowest temperature is 7.2 ℃ (44.96 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 22 ℃ (71.6 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 20.45 ℃ (68.81 ℉). The average number of rainy days in December is 4.4. The average rainfall is 35.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:15 (hours and minutes), in the middle of the month 10:03 and at the end of the month 10:00.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.| Mexicali | temperature: - | highest temperature: 20.9 ℃ (69.62 ℉) | lowest temperature: 5.9 ℃ (42.62 ℉) | rainfall: 13.4mm | rainy days: 2.1 |
| Tijuana | temperature: - | highest temperature: 20.5 ℃ (68.9 ℉) | lowest temperature: 7.2 ℃ (44.96 ℉) | rainfall: 35.7mm | rainy days: 4.4 |