Climate and monthly weather forecastClearlake, CA
Climate and monthly weather forecast
Weather in January
January, the same as December, is a cool winter month in Clearlake, California, with an average temperature ranging between min 39°F (3.9°C) and max 54.7°F (12.6°C). In the transition from December to January, Clearlake reports an average high-temperature of a still fresh 54.7°F (12.6°C), indicating a close resemblance to the prior month. Weather in January »Weather in February
February, the last month of the winter in Clearlake, is a refreshing month, with an average temperature varying between 38.7°F (3.7°C) and 56.3°F (13.5°C). At the onset of February, Clearlake records an average high-temperature of a moderate 56.3°F (13.5°C), showing little deviation from the preceding month. Weather in February »Weather in March
March, the first month of the spring in Clearlake, is still a mild month, with an average temperature fluctuating between 58.6°F (14.8°C) and 40.1°F (4.5°C). March brings an average high-temperature of a still moderate 58.6°F (14.8°C), nearly identical to the preceding month. Weather in March »Weather in April
April is an enjoyable spring month in Clearlake, California, with an average temperature ranging between min 43.2°F (6.2°C) and max 66°F (18.9°C). The shift into April is marked by a modest rise in the average high-temperature, moving from March's moderate 58.6°F (14.8°C) to a comfortable 66°F (18.9°C). Weather in April »Weather in May
May, the last month of the spring in Clearlake, is a moderately hot month, with temperature in the range of an average low of 48.2°F (9°C) and an average high of 73.9°F (23.3°C). The commencement of May sees a minor shift in the average high-temperature, moving from a comfortable 66°F (18.9°C) in April to a warm 73.9°F (23.3°C). Weather in May »Weather in June
The first month of the summer, June, is still a warm month in Clearlake, California, with an average temperature varying between 83.8°F (28.8°C) and 55.4°F (13°C). The start of June brings a shift in the average high-temperature, increasing from May's 73.9°F (23.3°C) to a still moderately hot 83.8°F (28.8°C). Weather in June »Weather in July
July in Clearlake, California, is a tropical summer month, with an average temperature fluctuating between 91.2°F (32.9°C) and 58.8°F (14.9°C). Clearlake witnesses the warmest weather in July, with temperatures averaging a high of 91.2°F (32.9°C) and a low of 58.8°F (14.9°C). The heat index value for July is estimated at a torrid 95°F (35°C). Weather in July »Weather in August
The last month of the summer, August, is another tropical month in Clearlake, California, with an average temperature varying between 58.3°F (14.6°C) and 90.1°F (32.3°C). Transitioning into August, Clearlake records an average high-temperature of a still tropical 90.1°F (32.3°C), almost identical to July's 91.2°F (32.9°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Clearlake, California, with an average temperature fluctuating between 85.1°F (29.5°C) and 55.8°F (13.2°C). Clearlake records a slight change with September's average high-temperatures adjusting to a warm 85.1°F (29.5°C) from August's 90.1°F (32.3°C). Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Clearlake, California, with an average temperature varying between 49.6°F (9.8°C) and 73.8°F (23.2°C). The onset of October comes with a shift in the average high-temperature, falling from 85.1°F (29.5°C) in September to a still warm 73.8°F (23.2°C). Weather in October »Weather in November
The last month of the autumn, November, is another comfortable month in Clearlake, California, with an average temperature fluctuating between 61°F (16.1°C) and 42.4°F (5.8°C). The beginning of November involves a decrease in the average high-temperature, transitioning from a warm 73.8°F (23.2°C) in October to a refreshing 61°F (16.1°C). Weather in November »Weather in December
The first month of the winter, December, is still a cool month in Clearlake, California, with an average temperature ranging between min 38.1°F (3.4°C) and max 52.7°F (11.5°C). December is Clearlake's coldest month, registering average high temperatures of 52.7°F (11.5°C) and lows of 38.1°F (3.4°C). Weather in December »Updated: Aug 7, 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
Throughout the year, in Clearlake, there are 79.8 rainfall days, and 17.44" (443mm) of precipitation is accumulated.
January through March, November and December are months with snowfall.
Throughout the year, there are 1.8 snowfall days, and 0.98" (25mm) of snow is accumulated.
February is the month with the most rainfall. Rain falls for 9.3 days and accumulates 3.7" (94mm) of precipitation.
February is the month with the most snowfall. Snow falls for 0.9 days and accumulates 0.51" (13mm) of snow.
March is the most humid month, with an average relative humidity of 74%.
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.
In Clearlake, snow does not fall in April through October.
June has the longest days of the year, with an average of 14h and 54min of daylight.
Clearlake witnesses the warmest weather in July, with temperatures averaging a high of 91.2°F (32.9°C) and a low of 58.8°F (14.9°C).
The least humid month is July, with an average relative humidity of 44%.
The months with the least rainfall are July and August Rain falls for 1.1 days and accumulates 0.04" (1mm) of rain.
The month with the most sunshine in Clearlake is July, with an average of 12h of sunshine.
With an average maximum UV index of 7, July is the month with the highest UV index.
The months with the lowest UV index are November and December, with an average maximum UV index of 2.
During the coldest month in Clearlake, December, temperatures average a high of 52.7°F (11.5°C) and a low of 38.1°F (3.4°C).
December has the shortest days of the year in Clearlake, with an average of 9h and 30min of daylight.
The month with the least sunshine is December, with an average of 5.3h of sunshine.
Average temperature
Clearlake, CA
The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is December (52.7°F).
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is December (38.1°F).
Average pressure
Clearlake, CA
- Average pressure in January:
30.14"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:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.91"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:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed
Clearlake, CA
- Average wind speed in January:
4.7mph - Average wind speed in February:
5.3mph - Average wind speed in March:
5.5mph - Average wind speed in April:
5.7mph - Average wind speed in May:
5.6mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
4.7mph - Average wind speed in August:
4.5mph - Average wind speed in September:
4.6mph - Average wind speed in October:
4.7mph - Average wind speed in November:
4.3mph - Average wind speed in December:
4.7mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).
Average humidity
Clearlake, CA
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (44%).
Average rainfall
Clearlake, CA
- Average rainfall in January:
3.35" - Average rainfall in February:
3.7" - Average rainfall in March:
2.64" - Average rainfall in April:
0.91" - Average rainfall in May:
0.91" - Average rainfall in June:
0.2"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.08" - Average rainfall in October:
0.94" - Average rainfall in November:
1.54" - Average rainfall in December:
3.11"
The wettest month (with the highest rainfall) is February (3.7").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days
Clearlake, CA
- Average rainfall days in January:
10.3 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
13.9 days - Average rainfall days in April:
8.9 days - Average rainfall days in May:
6.8 days - Average rainfall days in June:
2.6 days
- Average rainfall days in July:
1.1 days - Average rainfall days in August:
1.1 days - Average rainfall days in September:
2.1 days - Average rainfall days in October:
4.6 days - Average rainfall days in November:
7.9 days - Average rainfall days in December:
11.2 days
The month with the highest number of rainy days is March (13.9 days).
The months with the least rainy days are July and August (1.1 days).
Average snowfall
Clearlake, CA
The month with the highest snowfall is February (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Clearlake, CA
- Average snowfall days in January:
0.2 days - Average snowfall days in February:
0.9 days - Average snowfall days in March:
0.3 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.2 days - Average snowfall days in December:
0.2 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Clearlake, CA
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - 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 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 30min - Average sunshine in February:
5h and 42min - Average sunshine in March:
7h and 12min - Average sunshine in April:
9h and 42min - Average sunshine in May:
10h and 36min - Average sunshine in June:
11h and 36min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 54min - Average sunshine in September:
11h and 6min - Average sunshine in October:
6h and 54min - Average sunshine in November:
6h and 12min - Average sunshine in December:
5h and 18min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days
Clearlake, CA
- Average sunshine days in January:
19.6 days - Average sunshine days in February:
18.2 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
20.1 days - Average sunshine days in May:
23.1 days - Average sunshine days in June:
26.6 days
- Average sunshine days in July:
29.4 days - Average sunshine days in August:
29.3 days - Average sunshine days in September:
27.1 days - Average sunshine days in October:
25.5 days - Average sunshine days in November:
21.4 days - Average sunshine days in December:
19 days
The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (15.8 days).
Average UV index
Clearlake, CA
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 2).
Average cloud cover
Clearlake, CA
The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility
Clearlake, 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).
