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Contents
- 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
Weather in January
January, like December, in San Dimas, California, is another refreshing winter month, with an average temperature fluctuating between 46.9°F (8.3°C) and 64.9°F (18.3°C). January begins with an average high-temperature of a still refreshing 64.9°F (18.3°C), reflecting close similarity to the preceding month. Weather in January »
Weather in February
The last month of the winter, February, is another comfortable month in San Dimas, California, with temperature in the range of an average low of 45.7°F (7.6°C) and an average high of 64.4°F (18°C). San Dimas, California, commences February with an average high-temperature of a still enjoyable 64.4°F (18°C), maintaining a close resemblance to the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a pleasant month in San Dimas, California, with temperature in the range of an average high of 68.2°F (20.1°C) and an average low of 47.5°F (8.6°C). The shift into March reveals an average high-temperature of an agreeable 68.2°F (20.1°C), closely mirroring February's climate. Weather in March »
Weather in April
April, like March, is another pleasant spring month in San Dimas, California, with an average temperature fluctuating between 50.2°F (10.1°C) and 72.3°F (22.4°C). The arrival of April is marked by an average high-temperature of a still pleasant 72.3°F (22.4°C), bearing a close resemblance to March. Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in San Dimas, California, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 54°F (12.2°C). In May, San Dimas experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 72.3°F (22.4°C) in April to a warm 75.7°F (24.3°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in San Dimas, California, with an average temperature fluctuating between 82.9°F (28.3°C) and 57.7°F (14.3°C). The arrival of June witnesses a small shift in the average high-temperature, moving from 75.7°F (24.3°C) in May to a still moderately hot 82.9°F (28.3°C). Weather in June »
Weather in July
July in San Dimas, California, is a hot summer month, with an average temperature varying between 88.2°F (31.2°C) and 63.3°F (17.4°C). San Dimas, California, notes an average high-temperature of a hot 88.2°F (31.2°C) in July, displaying minor variation from June. Weather in July »
Weather in August
The last month of the summer, August, is another hot month in San Dimas, California, with an average temperature ranging between min 64.9°F (18.3°C) and max 89.4°F (31.9°C). August is San Dimas's warmest month, registering average high temperatures of 89.4°F (31.9°C) and lows of 64.9°F (18.3°C). The heat index for August is calculated to be a tropical 91.4°F (33°C). Weather in August »
Weather in September
September, the first month of the autumn in San Dimas, is still a hot month, with an average temperature ranging between max 86.7°F (30.4°C) and min 63.3°F (17.4°C). San Dimas's average high-temperature in September is a still hot 86.7°F (30.4°C), marking an insignificant difference from the 89.4°F (31.9°C) of August. Weather in September »
Weather in October
October, the same as September, is another warm autumn month in San Dimas, California, with temperature in the range of an average low of 58.1°F (14.5°C) and an average high of 78.3°F (25.7°C). With the commencement of October, San Dimas records a moderate temperature decline, with the average high easing from September's hot 86.7°F (30.4°C) to a warm 78.3°F (25.7°C). Weather in October »
Weather in November
November, the last month of the autumn in San Dimas, is also an agreeable month, with an average temperature varying between 51.8°F (11°C) and 70.7°F (21.5°C). The transition into November is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 78.3°F (25.7°C) in October to a pleasant 70.7°F (21.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a comfortable month in San Dimas, California, with temperature in the range of an average high of 62.4°F (16.9°C) and an average low of 45.5°F (7.5°C). December, with its average high-temperature of 62.4°F (16.9°C) and an average low-temperature of 45.5°F (7.5°C), holds the record as the coldest month. Weather in December »
[Resources]Frequently asked questions
How many days does it rain in San Dimas?
In San Dimas, California, during the entire year, the rain falls for 45.2 days and collects up to 6.5" (165mm) of precipitation.
What is the month with the least sunshine in San Dimas?
The months with the least sunshine are January, February and December, with an average of 7h of sunshine.
What is the rainiest month in San Dimas?
February is the month with the most rainfall in San Dimas. Rain falls for 5 days and accumulates 1.46" (37mm) of precipitation.
What are the most humid months in San Dimas?
The months with the highest humidity in San Dimas, California, are March and May, with an average relative humidity of 55%.
When is Daylight Saving Time (DST) in San Dimas?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in San Dimas, 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 driest month in San Dimas?
The month with the least rainfall in San Dimas, California, is June, when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.
When are the longest days in San Dimas?
The month with the longest days in San Dimas is June, with an average of 14h and 24min of daylight.
What is the month with the most sunshine in San Dimas?
June and July, with an average of 12.1h of sunshine, are months with the most sunshine.
When is the highest UV index in San Dimas?
The months with the highest UV index in San Dimas are July and August, with an average maximum UV index of 7.
What part of the year is the hottest in San Dimas?
With an average high-temperature of 89.4°F (31.9°C) and an average low-temperature of 64.9°F (18.3°C), August is the warmest month.
What is the least humid month in San Dimas?
August and November, with an average relative humidity of 45%, are the least humid months.
What is the coldest month in San Dimas?
With average high temperatures of 62.4°F (16.9°C) and lows of 45.5°F (7.5°C), December is the coldest month in San Dimas, California.
What is the month with the shortest days in San Dimas?
December has the shortest days of the year, with an average of 9h and 54min of daylight.
What is the month with the lowest UV index in San Dimas?
December is the month with the lowest UV index in San Dimas, with an average maximum UV index of 3.
Average temperature
San Dimas, CA
The warmest month (with the highest average high temperature) is August (89.4°F).
The month with the lowest average high temperature is December (62.4°F).
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).
Average pressure
San Dimas, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.9"Hg - Average pressure in August:
29.88"Hg - Average pressure in September:
29.88"Hg - Average pressure in October:
29.94"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
San Dimas, CA
- Average wind speed in January:
5.2mph - Average wind speed in February:
4.9mph - Average wind speed in March:
5.1mph - Average wind speed in April:
5.7mph - Average wind speed in May:
5.7mph - Average wind speed in June:
5.3mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.7mph - Average wind speed in September:
4.3mph - Average wind speed in October:
4.6mph - Average wind speed in November:
4.8mph - Average wind speed in December:
5.1mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity
San Dimas, CA
The months with the highest relative humidity are March and May (55%).
The months with the lowest relative humidity are August and November (45%).
Average rainfall
San Dimas, CA
- Average rainfall in January:
1.06" - Average rainfall in February:
1.46" - Average rainfall in March:
0.67" - Average rainfall in April:
0.47" - Average rainfall in May:
0.24" - Average rainfall in June:
0.04"
The wettest month (with the highest rainfall) is February (1.46").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
San Dimas, CA
- Average rainfall days in January:
4.9 days - Average rainfall days in February:
5 days - Average rainfall days in March:
6.3 days - Average rainfall days in April:
4.8 days - Average rainfall days in May:
3.4 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
3.5 days - Average rainfall days in August:
1.8 days - Average rainfall days in September:
2.5 days - Average rainfall days in October:
2.6 days - Average rainfall days in November:
3.5 days - Average rainfall days in December:
5.7 days
The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (1.2 days).
Average daylight / Average sunshine
San Dimas, CA
- Average daylight in January:
10h and 1min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 2min
- Average daylight in July:
14h and 1min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 2min - Average daylight in December:
9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January:
7h and 0min - Average sunshine in February:
7h and 0min - Average sunshine in March:
9h and 0min - Average sunshine in April:
11h and 2min - Average sunshine in May:
11h and 5min - Average sunshine in June:
12h and 1min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 4min - Average sunshine in October:
8h and 5min - Average sunshine in November:
7h and 2min - Average sunshine in December:
7h and 0min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 7h and 0min).
Average sunshine days
San Dimas, CA
- Average sunshine days in January:
25.1 days - Average sunshine days in February:
22 days - Average sunshine days in March:
24.6 days - Average sunshine days in April:
24.7 days - Average sunshine days in May:
25.9 days - Average sunshine days in June:
27.8 days
- Average sunshine days in July:
25 days - Average sunshine days in August:
26.9 days - Average sunshine days in September:
25.5 days - Average sunshine days in October:
27 days - Average sunshine days in November:
25.8 days - Average sunshine days in December:
23.8 days
The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is February (22 days).
Average UV index
San Dimas, CA
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
San Dimas, CA
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility
San Dimas, 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 Dimas, California, USA
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