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Contents
- The climate of San Anselmo
- The best time to visit San Anselmo
- The worst time to visit San Anselmo
- Spring weather in San Anselmo
- Summer weather in San Anselmo
- Autumn weather in San Anselmo
- Winter weather in San Anselmo
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of San Anselmo
San Anselmo, California is located in a climate zone identified as Csb by the Köppen climate classification system. This indicates a Mediterranean climate with warm summer conditions. The geographical position of San Anselmo results in mostly mild and pleasant weather throughout the year.
The temperature averages from a minimum 45.5°F (7.5°C) to a maximum of 72.3°F (22.4°C). Fluctuations in temperature are moderate, allowing for comfortable living conditions for inhabitants and visitors alike. Relative humidity levels range from a low of 68% to a high of 77%. The presence of humidity infuses the air with moisture, contributing to the overall temperate climate.
Rainfall in San Anselmo varies throughout the year, with the maximum amount recorded as 0.87" (22mm) and minimum as 0.04" (1mm). The number of days with rainfall ranges between 1.2 days to 8.8 days a month, indicating periodic bouts of rain amidst clear skies. Months with maximum rainfall appear to coincide with cooler temperatures, giving San Anselmo a distinctive rainy season in the cooler months.
The temperature averages from a minimum 45.5°F (7.5°C) to a maximum of 72.3°F (22.4°C). Fluctuations in temperature are moderate, allowing for comfortable living conditions for inhabitants and visitors alike. Relative humidity levels range from a low of 68% to a high of 77%. The presence of humidity infuses the air with moisture, contributing to the overall temperate climate.
Rainfall in San Anselmo varies throughout the year, with the maximum amount recorded as 0.87" (22mm) and minimum as 0.04" (1mm). The number of days with rainfall ranges between 1.2 days to 8.8 days a month, indicating periodic bouts of rain amidst clear skies. Months with maximum rainfall appear to coincide with cooler temperatures, giving San Anselmo a distinctive rainy season in the cooler months.
The best time to visit San Anselmo
The ideal time for visiting San Anselmo depends on the personal preference of the visitor. However, considering the climatic conditions, the period from May to September could be the most suitable. This time frame witnesses the highest temperatures, with averages from 62.8°F (17.1°C) to 72.3°F (22.4°C), offering warm and pleasant conditions. Rainfall is sparse, ranging between 0.04" (1mm) to 0.28" (7mm), and the average daylight hours are between 13.2 hours to 14.8 hours.
The worst time to visit San Anselmo
Conversely, the months from November to February would perhaps be least favorable for visiting San Anselmo. The lower temperatures averaging between 55.4°F (13°C) to 59.4°F (15.2°C) combined with increased rainfall ranging from 0.47" (12mm) to 0.87" (22mm) and lower daylight hours from 9.6 hours to 10.8 hours could potentially dampen the visitor experience.
Spring weather in San Anselmo
The Spring season in San Anselmo ensures a transition from the relatively cooler winter season to a warmer summer. During this phase, there is an upswing in temperatures, with average highs ranging from 59.4°F (15.2°C) to 69.1°F (20.6°C) and lows from 46.9°F (8.3°C) to 53.2°F (11.8°C). Rainfall is lower than winter with an average between 0.59" (15mm) to 0.2" (5mm). The hours of daylight also increase, offering visitors an extended time to explore the city's attractions.
Summer weather in San Anselmo
Summers prevail from June to August in San Anselmo marking the warmest period of the year. High temperatures range from 69.1°F (20.6°C) to 72.3°F (22.4°C) while lower temperatures vary between 53.2°F (11.8°C) to 56.1°F (13.4°C). Rainfall is the lowest during this period with an average of 0.04" (1mm), providing nice and dry weather conditions. This is also the period with extended daylight hours, soaring between 14.5 hours to 14.8 hours, allowing maximum time for outdoor activities.
Autumn weather in San Anselmo
Autumn marks the transition from the warm summers to the somewhat cooler winters. High temperatures range from 61.5°F (16.4°C) to 72.3°F (22.4°C) while lows fluctuate between 49.6°F (9.8°C) to 56.1°F (13.4°C). Rainfall begins to pick up post summer, with averages between 0.04" (1mm) to 0.47" (12mm), signalling the onset of the rainy season. The daylight hours gradually decrease from 12.4 hours to 10.1 hours as the season progresses.
Winter weather in San Anselmo
Winter months in San Anselmo introduce cooler weather compared to the rest of the year. The temperature highs range from 55.4°F (13°C) to 56.1°F (13.4°C) with lows between 45.3°F (7.4°C) to 45.5°F (7.5°C). The rainfall increases, leading to an average between 0.59" (15mm) to 0.87" (22mm), marking the peak of the rainy season. Reduced daylight hours, from 9.6 hours to 9.9 hours, combined with increased cloud cover, contribute to the overall winter ambiance in the city.
Weather in January
Starting the year, January sees one of the lowest average temperatures in San Anselmo, California, with minimums hovering at 45.5°F (7.5°C) and highs reaching 56.1°F (13.4°C). The combination of humidity at 74% and significant cloud coverage of 36% makes for quite overcast conditions. Weather in January »
Weather in February
Moving into February, San Anselmo experiences a slight ascend in temperatures and rainfall, peaking at 57.9°F (14.4°C) and 0.87" (22mm), respectively. Intervals of cloudiness exist due to a 34% cloud cover, while daylight extends by almost an hour compared to January. Weather in February »
Weather in March
March heralds the onset of Spring, noticing a marginal rise in temperatures to a balmy average of 59.4°F (15.2°C). Despite an increase in daylight to 12 hours, the cloud cover intensifies to 39%, resulting in slightly overcast days. Weather in March »
Weather in April
April in San Anselmo testifies to a considerable leap in temperatures reaching 62.8°F (17.1°C), signifying a clear progression towards summer. The lengthening of days ushers in more sunshine hours. The city witnesses the commencement of the dry spell with the average rain tapering down to 0.2" (5mm). Weather in April »
Weather in May
In May, San Anselmo enters the realm of summer temperatures as highs ascend to 64.9°F (18.3°C). With 14.2 daylight hours, it beholds sun-soaked afternoons. Rainfall further reduces to 0.28" (7mm), continuing the characteristic dryness of California's summer months. Weather in May »
Weather in June
June witnesses a visible shift in San Anselmo weather as the average high soars to a balmy 69.1°F (20.6°C). The length of the day and the sunlight exposure reach their zenith making it the best time for outdoor activities. Despite this, the rainfall is at a minimal 0.04" (1mm). Weather in June »
Weather in July
July brings the peak of summer to San Anselmo, with temperature highs averaging 70.5°F (21.4°C). There's an ample amount of sunlight and long days that lull into beautiful Californian summer nights. Nevertheless, it sees a slight pullback in daylight hours from the previous month. Weather in July »
Weather in August
In August, San Anselmo endures its warmest month with maximum temperatures reaching 71.2°F (21.8°C). The high heat comes with noticeable humidity of 76%. The long sunshine hours bode well for outdoor enthusiasts, despite a restraining reduction in daylight hours. Weather in August »
Weather in September
As September arrives, San Anselmo gets a respite from the peak summer heat as temperature highs decline to 72.3°F (22.4°C). It ushers in slightly cooler days and nights, painting a pleasant climate canvas. This is accompanied by the least cloud cover observed in the year at 19%, making for clear sky days. Weather in September »
Weather in October
October represents the start of cooling trends in San Anselmo as temperatures settle to a comfortable 68.9°F (20.5°C). The shorter daylight hours and reduced sunshine mark the advent of fall. Despite this, October sees a slight increase in rainfall to 0.12" (3mm), evidencing the season change. Weather in October »
Weather in November
In November, temperatures in San Anselmo take a more substantial dip, averaging 61.5°F (16.4°C), indicating the onset of colder months. The fall season is in full mode, translating into shorter days and reduced sunshine. The city experiences a palpable increase in rainfall to 0.47" (12mm), as winter draws nearer. Weather in November »
Weather in December
December marks the year-end with the lowest temperatures in San Anselmo, descending to an average low of 45.3°F (7.4°C). The darkness sets in early, and the city gets limited hours of sunshine. Interestingly, the amount of rainfall spikes to 0.67" (17mm), making it the month with the most precipitation. Weather in December »
Updated: Jun 17, 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
How many days does it rain?
In San Anselmo, during the entire year, the rain falls for 48 days and collects up to 3.94" (100mm) of precipitation.
When is the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.
What is the wettest month?
The month with the most rainfall is February, when the rain falls for 5.3 days and typically aggregates up to 0.87" (22mm) of precipitation.
What is the most humid month?
March is the most humid month in San Anselmo, with an average relative humidity of 77%.
When is Daylight Saving Time (DST)?
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.
What is the month with the highest UV index?
The months with the highest UV index are April, June through September, with an average maximum UV index of 5.
What is the driest month?
The months with the least rainfall are June through September Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.
When are the longest days?
June has the longest days of the year, with an average of 14h and 48min of daylight.
What month has the most sunshine?
With an average of 11.2h of sunshine, July has the most sunshine of the year.
What is the hottest time of year?
In San Anselmo, September records the average highest temperatures, peaking at 72.3°F (22.4°C) and reaching a low of 56.1°F (13.4°C).
What is the least humid month in San Anselmo?
With an average relative humidity of 68%, October is the least humid month.
What is the coldest month in San Anselmo?
December, with its average high-temperature of 55.4°F (13°C) and an average low-temperature of 45.3°F (7.4°C), holds the record as the coldest month.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 36min of daylight.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 5.5h of sunshine.
Average temperature
San Anselmo, CA
The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.4°F).
The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).
Average pressure
San Anselmo, CA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.07"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:
30.1"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
San Anselmo, CA
- Average wind speed in January:
6mph - Average wind speed in February:
6.8mph - Average wind speed in March:
7.3mph - Average wind speed in April:
7.6mph - Average wind speed in May:
7.8mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.4mph - Average wind speed in September:
5.9mph - Average wind speed in October:
5.5mph - Average wind speed in November:
5.5mph - Average wind speed in December:
6.2mph
The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).
Average humidity
San Anselmo, CA
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).
Average rainfall
San Anselmo, CA
- Average rainfall in January:
0.59" - Average rainfall in February:
0.87" - Average rainfall in March:
0.59" - Average rainfall in April:
0.2" - Average rainfall in May:
0.28" - 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:
0.12" - Average rainfall in November:
0.47" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days
San Anselmo, CA
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
5.5 days - Average rainfall days in May:
3.3 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
1.4 days - Average rainfall days in August:
1.2 days - Average rainfall days in September:
1.7 days - Average rainfall days in October:
2.6 days - Average rainfall days in November:
3.9 days - Average rainfall days in December:
7.2 days
The month with the highest number of rainy days is March (8.8 days).
The months with the least rainy days are June and August (1.2 days).
Average daylight / Average sunshine
San Anselmo, CA
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
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 36min).
- Average sunshine in January:
5h and 4min - Average sunshine in February:
6h and 1min - Average sunshine in March:
7h and 3min - Average sunshine in April:
10h and 0min - Average sunshine in May:
10h and 0min - Average sunshine in June:
11h and 1min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
10h and 5min - Average sunshine in September:
10h and 2min - Average sunshine in October:
6h and 5min - Average sunshine in November:
6h and 2min - Average sunshine in December:
5h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days
San Anselmo, CA
- Average sunshine days in January:
24.2 days - Average sunshine days in February:
21.4 days - Average sunshine days in March:
20.7 days - Average sunshine days in April:
23.3 days - Average sunshine days in May:
24.7 days - Average sunshine days in June:
26.4 days
- Average sunshine days in July:
26.3 days - Average sunshine days in August:
24.8 days - Average sunshine days in September:
26 days - Average sunshine days in October:
26.2 days - Average sunshine days in November:
24 days - Average sunshine days in December:
22.1 days
The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).
Average UV index
San Anselmo, CA
The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
San Anselmo, CA
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility
San Anselmo, 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).
San Anselmo, California, USA
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