Climate and monthly weather forecastSan Juan Bautista, CA
Climate and monthly weather forecast
Weather in January
January, the same as December, in San Juan Bautista, California, is a moderate winter month, with an average temperature ranging between min 41.5°F (5.3°C) and max 59.7°F (15.4°C). A minor adjustment in San Juan Bautista's average high-temperature is noted with the start of January, touching a still refreshing 59.7°F (15.4°C) from December's 57.6°F (14.2°C). Weather in January »Weather in February
February, the last month of the winter in San Juan Bautista, is also a moderate month, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 60.6°F (15.9°C). Entering February, San Juan Bautista's average high-temperature reads a still moderate 60.6°F (15.9°C), indicating a close resemblance to the previous month's climate. Weather in February »Weather in March
March, the first month of the spring in San Juan Bautista, is a comfortable month, with an average temperature varying between 63.5°F (17.5°C) and 40.6°F (4.8°C). March's onset records a minor alteration in the average high-temperature to an enjoyable 63.5°F (17.5°C) from February's 60.6°F (15.9°C). Weather in March »Weather in April
April in San Juan Bautista, California, is an agreeable spring month, with an average temperature varying between 42.4°F (5.8°C) and 68°F (20°C). With the onset of April, the average high-temperature registers at a pleasant 68°F (20°C), subtly different from March's 63.5°F (17.5°C). Weather in April »Weather in May
The last month of the spring, May, is also an agreeable month in San Juan Bautista, California, with temperature in the range of an average high of 72.3°F (22.4°C) and an average low of 46°F (7.8°C). The transition into May shows a subtle variation to a still pleasant 72.3°F (22.4°C) from April's 68°F (20°C) in the average high-temperature. Weather in May »Weather in June
The first month of the summer, June, is a warm month in San Juan Bautista, California, with temperature in the range of an average high of 80.1°F (26.7°C) and an average low of 50.5°F (10.3°C). June's arrival is noted with a slight increase in the average high-temperature, moving from a pleasant 72.3°F (22.4°C) in May to a moderately hot 80.1°F (26.7°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in San Juan Bautista, California, with temperature in the range of an average low of 53.8°F (12.1°C) and an average high of 84.7°F (29.3°C). During July and August, San Juan Bautista experiences its highest average temperatures, peaking at 84.7°F (29.3°C). July's heat index is appraised at a hot 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in San Juan Bautista, is another warm month, with an average temperature fluctuating between 54.3°F (12.4°C) and 84.7°F (29.3°C). The highest point of temperatures falls in July and August, when the average high-temperature ascends to 84.7°F (29.3°C). The average heat index in August is appraised at a tropical 89.6°F (32°C). Weather in August »Weather in September
September, the first month of the autumn in San Juan Bautista, is still a warm month, with temperature in the range of an average high of 83.3°F (28.5°C) and an average low of 54.1°F (12.3°C). September reports an average high-temperature of a still moderately hot 83.3°F (28.5°C), slightly varied from August's 84.7°F (29.3°C). Weather in September »Weather in October
October, like September, in San Juan Bautista, California, is a moderately hot autumn month, with an average temperature varying between 50.9°F (10.5°C) and 75.4°F (24.1°C). With the onset of October, San Juan Bautista's climate undergoes a slight change as the average high-temperature moves from a warm 83.3°F (28.5°C) in September to a still moderately hot 75.4°F (24.1°C). Weather in October »Weather in November
November, the last month of the autumn in San Juan Bautista, is another refreshing month, with temperature in the range of an average low of 44.8°F (7.1°C) and an average high of 65.8°F (18.8°C). San Juan Bautista experiences a temperature shift at the start of November, with average high-temperatures adjusting from a moderately hot 75.4°F (24.1°C) in October to an enjoyable 65.8°F (18.8°C). Weather in November »Weather in December
The first month of the winter, December, is still a mild month in San Juan Bautista, California, with an average temperature ranging between min 40.6°F (4.8°C) and max 57.6°F (14.2°C). In San Juan Bautista, the month of December registers the lowest temperatures, averaging 57.6°F (14.2°C) at the peak and 40.6°F (4.8°C) at the lowest. Weather in December »Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature
San Juan Bautista, CA
The warmest months (with the highest average high temperature) are July and August (84.7°F).
The month with the lowest average high temperature is December (57.6°F).
The month with the highest average low temperature is August (54.3°F).
The coldest months (with the lowest average low temperature) are February, March and December (40.6°F).
Average pressure
San Juan Bautista, CA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed
San Juan Bautista, CA
- Average wind speed in January:
4mph - Average wind speed in February:
4.5mph - Average wind speed in March:
4.6mph - Average wind speed in April:
5mph - Average wind speed in May:
5.3mph - Average wind speed in June:
5.2mph
- Average wind speed in July:
4.7mph - Average wind speed in August:
4.2mph - Average wind speed in September:
4.1mph - Average wind speed in October:
4mph - Average wind speed in November:
3.9mph - Average wind speed in December:
4mph
The windiest month (with the highest average wind speed) is May (5.3mph).
The calmest month (with the lowest average wind speed) is November (3.9mph).
Average humidity
San Juan Bautista, CA
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (58%).
Average rainfall
San Juan Bautista, CA
- Average rainfall in January:
0.94" - Average rainfall in February:
0.94" - Average rainfall in March:
0.91" - Average rainfall in April:
0.47" - Average rainfall in May:
0.2" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.04" - Average rainfall in October:
0.24" - Average rainfall in November:
0.55" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is December (1.02").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days
San Juan Bautista, CA
- Average rainfall days in January:
6.6 days - Average rainfall days in February:
6.5 days - Average rainfall days in March:
9 days - Average rainfall days in April:
6.4 days - Average rainfall days in May:
2.9 days - Average rainfall days in June:
0.7 days
- Average rainfall days in July:
1.5 days - Average rainfall days in August:
0.5 days - Average rainfall days in September:
1.7 days - Average rainfall days in October:
2.8 days - Average rainfall days in November:
4.5 days - Average rainfall days in December:
7.4 days
The month with the highest number of rainy days is March (9 days).
The month with the least rainy days is August (0.5 days).
Average daylight / Average sunshine
San Juan Bautista, CA
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 12min - Average daylight in June:
14h and 36min
- Average daylight in July:
14h and 24min - Average daylight in August:
13h and 30min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 12min - Average daylight in December:
9h and 42min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
6h and 24min - Average sunshine in February:
6h and 18min - Average sunshine in March:
8h and 12min - Average sunshine in April:
10h and 24min - Average sunshine in May:
11h and 6min - Average sunshine in June:
11h and 54min
- Average sunshine in July:
12h - Average sunshine in August:
12h - Average sunshine in September:
11h and 18min - Average sunshine in October:
7h and 12min - Average sunshine in November:
6h and 42min - Average sunshine in December:
6h
The months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6h).
Average sunshine days
San Juan Bautista, CA
- Average sunshine days in January:
23.4 days - Average sunshine days in February:
20.6 days - Average sunshine days in March:
21.1 days - Average sunshine days in April:
23.3 days - Average sunshine days in May:
27 days - Average sunshine days in June:
28.9 days
- Average sunshine days in July:
28.8 days - Average sunshine days in August:
29.6 days - Average sunshine days in September:
27.8 days - Average sunshine days in October:
27.1 days - Average sunshine days in November:
24.2 days - Average sunshine days in December:
22.3 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is February (20.6 days).
Average UV index
San Juan Bautista, CA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
San Juan Bautista, CA
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility
San Juan Bautista, CA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).





