Climate and monthly weather forecastSebastopol, CA
Climate and monthly weather forecast
Weather in January
January, like December, is another mild winter month in Sebastopol, California, with an average temperature varying between 57.2°F (14°C) and 43.2°F (6.2°C). Entering January, the average high-temperature is recorded at a still moderate 57.2°F (14°C), exhibiting a minimal shift from December's 55.6°F (13.1°C). Weather in January »Weather in February
The last month of the winter, February, is another mild month in Sebastopol, California, with an average temperature fluctuating between 58.8°F (14.9°C) and 42.8°F (6°C). With the onset of February, the average high-temperature registers at a still mild 58.8°F (14.9°C), subtly different from January's 57.2°F (14°C). Weather in February »Weather in March
March, the first month of the spring in Sebastopol, is still a refreshing month, with an average temperature varying between 60.4°F (15.8°C) and 43.5°F (6.4°C). March's arrival brings an average high-temperature of a still moderate 60.4°F (15.8°C), demonstrating subtle variation from the preceding month. Weather in March »Weather in April
April in Sebastopol, California, is a comfortable spring month, with an average temperature ranging between max 64.9°F (18.3°C) and min 45.5°F (7.5°C). April's onset brings an average high-temperature of an enjoyable 64.9°F (18.3°C), showing a minute difference from March's 60.4°F (15.8°C). Weather in April »Weather in May
May, the last month of the spring in Sebastopol, is a pleasant month, with an average temperature fluctuating between 48.6°F (9.2°C) and 69.1°F (20.6°C). In May, Sebastopol experiences a minor shift in meteorological conditions with average high-temperatures marked at a pleasant 69.1°F (20.6°C), closely mirroring the climate in April. Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Sebastopol, California, with an average temperature ranging between max 76.3°F (24.6°C) and min 53.1°F (11.7°C). June's onset brings a minor rise in the average high-temperature, moving from an agreeable 69.1°F (20.6°C) in May to a moderately hot 76.3°F (24.6°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Sebastopol, California, with an average temperature fluctuating between 79.3°F (26.3°C) and 54.1°F (12.3°C). July reports an average high-temperature of a still moderately hot 79.3°F (26.3°C), slightly varied from June's 76.3°F (24.6°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Sebastopol, California, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 54.7°F (12.6°C). August is Sebastopol's warmest month, registering average high temperatures of 79.7°F (26.5°C) and lows of 54.7°F (12.6°C). Weather in August »Weather in September
September, the first month of the autumn in Sebastopol, is still a warm month, with temperature in the range of an average high of 79°F (26.1°C) and an average low of 54.7°F (12.6°C). On the advent of September, Sebastopol's average high-temperature exhibits a minor adjustment to a still warm 79°F (26.1°C) from August's 79.7°F (26.5°C). Weather in September »Weather in October
October, like September, is another pleasant autumn month in Sebastopol, California, with an average temperature ranging between min 51.8°F (11°C) and max 72.3°F (22.4°C). Sebastopol's October weather shows a modest shift in high-temperatures, falling from September's moderately hot 79°F (26.1°C) to a pleasant 72.3°F (22.4°C). Weather in October »Weather in November
November, the last month of the autumn in Sebastopol, is another comfortable month, with an average temperature fluctuating between 63.1°F (17.3°C) and 46°F (7.8°C). Sebastopol's weather changes with the onset of November, slightly falling from a pleasant 72.3°F (22.4°C) in October to a comfortable 63.1°F (17.3°C). Weather in November »Weather in December
December, the first month of the winter in Sebastopol, is still a mild month, with an average temperature fluctuating between 41.9°F (5.5°C) and 55.6°F (13.1°C). The month of December, characterized by an average high of 55.6°F (13.1°C) and a low of 41.9°F (5.5°C), is recognized as the coldest. Weather in December »Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Sebastopol, during the entire year, the rain falls for 72.8 days and collects up to 12.01" (305mm) of precipitation.
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.
The month with the most rainfall is February, when the rain falls for 9.1 days and typically aggregates up to 2.64" (67mm) of precipitation.
The most humid month is March, with an average relative humidity of 77%.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
The month with the longest days is June, with an average of 14h and 48min of daylight.
June is the month with the highest UV index, with an average maximum UV index of 6.
July and August are months with the least rain when the rain falls for 1.5 days and typically aggregates up to 0.04" (1mm) of rain.
The month with the most sunshine is July, with an average of 11.9h of sunshine.
August is the warmest month, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 54.7°F (12.6°C).
The least humid month is September, with an average relative humidity of 63%.
In Sebastopol, the lowest temperatures are generally noted in December, averaging a high of 55.6°F (13.1°C) and a low of 41.9°F (5.5°C).
With an average of 9h and 30min of daylight, December has the shortest days of the year.
December has the least sunshine of the year, with an average of 5.7h of sunshine.
Average temperature
Sebastopol, CA
The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (55.6°F).
The months with the highest average low temperature are August and September (54.7°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure
Sebastopol, CA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.06"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:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.1"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
Sebastopol, CA
- Average wind speed in January:
5.2mph - Average wind speed in February:
6mph - Average wind speed in March:
6.5mph - Average wind speed in April:
7mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.2mph - Average wind speed in October:
5.1mph - Average wind speed in November:
4.9mph - Average wind speed in December:
5.2mph
The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).
Average humidity
Sebastopol, CA
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (63%).
Average rainfall
Sebastopol, CA
- Average rainfall in January:
2.01" - Average rainfall in February:
2.64" - Average rainfall in March:
2.01" - Average rainfall in April:
0.55" - Average rainfall in May:
0.55" - Average rainfall in June:
0.12"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.12" - Average rainfall in October:
0.67" - Average rainfall in November:
1.02" - Average rainfall in December:
2.24"
The wettest month (with the highest rainfall) is February (2.64").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days
Sebastopol, CA
- Average rainfall days in January:
10 days - Average rainfall days in February:
9.1 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
7 days - Average rainfall days in May:
5.3 days - Average rainfall days in June:
1.9 days
- Average rainfall days in July:
1.5 days - Average rainfall days in August:
0.8 days - Average rainfall days in September:
2.8 days - Average rainfall days in October:
4.8 days - Average rainfall days in November:
6.5 days - Average rainfall days in December:
10.5 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight / Average sunshine
Sebastopol, CA
- Average daylight in January:
9h and 54min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 48min - Average sunshine in February:
6h and 12min - Average sunshine in March:
7h and 30min - Average sunshine in April:
10h and 6min - Average sunshine in May:
10h and 30min - Average sunshine in June:
11h and 36min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
11h and 48min - Average sunshine in September:
11h and 0min - Average sunshine in October:
6h and 54min - Average sunshine in November:
6h and 30min - Average sunshine in December:
5h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days
Sebastopol, CA
- Average sunshine days in January:
19.9 days - Average sunshine days in February:
18.1 days - Average sunshine days in March:
17.1 days - Average sunshine days in April:
21.8 days - Average sunshine days in May:
23.4 days - Average sunshine days in June:
26.5 days
- Average sunshine days in July:
27.2 days - Average sunshine days in August:
27.1 days - Average sunshine days in September:
26.5 days - Average sunshine days in October:
24.8 days - Average sunshine days in November:
21.9 days - Average sunshine days in December:
19.5 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (17.1 days).
Average UV index
Sebastopol, CA
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
Sebastopol, CA
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility
Sebastopol, 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).
