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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 Rosemead, California, is another enjoyable winter month, with an average temperature varying between 48.6°F (9.2°C) and 65.7°F (18.7°C). In January, Rosemead experiences a minor shift in meteorological conditions with average high-temperatures marked at a still comfortable 65.7°F (18.7°C), closely mirroring the climate in December. Weather in January »
Weather in February
February, the last month of the winter in Rosemead, is another refreshing month, with an average temperature fluctuating between 65.3°F (18.5°C) and 47.7°F (8.7°C). February's presence marks an average high-temperature of a still enjoyable 65.3°F (18.5°C), subtly varied from January's 65.7°F (18.7°C). Weather in February »
Weather in March
The first month of the spring, March, is a pleasant month in Rosemead, California, with temperature in the range of an average high of 68.7°F (20.4°C) and an average low of 48.9°F (9.4°C). The arrival of March marks a slight shift to an average high-temperature of a pleasant 68.7°F (20.4°C) from February's 65.3°F (18.5°C). Weather in March »
Weather in April
April, the same as March, in Rosemead, California, is another pleasant spring month, with temperature in the range of an average low of 51.8°F (11°C) and an average high of 72.3°F (22.4°C). The transition into April reveals an average high-temperature of a still agreeable 72.3°F (22.4°C), mirroring a close resemblance to March. Weather in April »
Weather in May
May, the last month of the spring in Rosemead, is a moderately hot month, with temperature in the range of an average low of 54.7°F (12.6°C) and an average high of 75°F (23.9°C). In May, Rosemead experiences a minor shift in meteorological conditions with average high-temperatures marked at a moderately hot 75°F (23.9°C), closely mirroring the climate in April. Weather in May »
Weather in June
June, the first month of the summer in Rosemead, is also a moderately hot month, with temperature in the range of an average high of 80.4°F (26.9°C) and an average low of 57.9°F (14.4°C). June's arrival brings a modest temperature shift, moving from a warm 75°F (23.9°C) in May to a still moderately hot 80.4°F (26.9°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Rosemead, California, with an average temperature fluctuating between 63.3°F (17.4°C) and 85.6°F (29.8°C). With the transition into July, Rosemead notes an average high-temperature of a still moderately hot 85.6°F (29.8°C), closely resembling June. Weather in July »
Weather in August
The last month of the summer, August, is a hot month in Rosemead, California, with an average temperature ranging between min 64.9°F (18.3°C) and max 87.4°F (30.8°C). Rosemead's temperature records reveal August as the warmest month, marked by average highs of 87.4°F (30.8°C) and lows of 64.9°F (18.3°C). The heat index value for August is evaluated at a hot 89.6°F (32°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Rosemead, California, with an average temperature fluctuating between 85.5°F (29.7°C) and 63.5°F (17.5°C). The average high-temperature is a moderately hot 85.5°F (29.7°C) in September, hardly different from the 87.4°F (30.8°C) recorded in August. Weather in September »
Weather in October
October, the same as September, is a moderately hot autumn month in Rosemead, California, with temperature in the range of an average low of 59.4°F (15.2°C) and an average high of 79°F (26.1°C). With October's onset, the weather reveals a slight temperature decrease, transitioning from a moderately hot 85.5°F (29.7°C) in September to a still warm 79°F (26.1°C). Weather in October »
Weather in November
The last month of the autumn, November, is also an agreeable month in Rosemead, California, with an average temperature varying between 54°F (12.2°C) and 71.4°F (21.9°C). The advent of November brings a slight shift in average high-temperature, moving from a warm 79°F (26.1°C) in October to a pleasant 71.4°F (21.9°C). Weather in November »
Weather in December
December, the first month of the winter in Rosemead, is still a comfortable month, with an average temperature fluctuating between 63.5°F (17.5°C) and 47.5°F (8.6°C). Rosemead's December weather, with an average high temperature of 63.5°F (17.5°C) and an average low temperature of 47.5°F (8.6°C), tends to be the coldest of the year. Weather in December »
Updated: Jul 12, 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 Rosemead, during the entire year, the rain falls for 43 days and collects up to 6.06" (154mm) of precipitation.
What are the months with the least sunshine?
The months with the least sunshine are January, February and December, with an average of 6.9h of sunshine.
What are the months with the lowest UV index in Rosemead?
January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index.
What is the rainiest month?
The month with the most rainfall is February, when the rain falls for 5.2 days and typically aggregates up to 1.3" (33mm) of precipitation.
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 most humid month?
June is the most humid month, with an average relative humidity of 59%.
What is the driest month in Rosemead?
June is the month with the least rainfall. Rain falls for 1.2 days and accumulates 0.04" (1mm) of precipitation.
When are the longest days?
The month with the longest days in Rosemead is June, with an average of 14h and 24min of daylight.
When is the highest UV index?
The months with the highest UV index are June through September, with an average maximum UV index of 6.
What month has the most sunshine?
July has the most sunshine of the year, with an average of 12.1h of sunshine.
What time of the year is the hottest?
Rosemead experiences its highest temperatures in August, with an average peak of 87.4°F (30.8°C) and a low of 64.9°F (18.3°C).
What is the least humid month?
With an average relative humidity of 47%, November is the least humid month.
What is the coldest month?
December stands out as Rosemead's coldest month, with an average high-temperature of 63.5°F (17.5°C) and a low-temperature of 47.5°F (8.6°C).
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 54min of daylight.
Average temperature
Rosemead, CA
The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is December (63.5°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 (47.5°F).
Average pressure
Rosemead, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.89"Hg - Average pressure in September:
29.89"Hg - Average pressure in October:
29.95"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Rosemead, CA
- Average wind speed in January:
5.3mph - Average wind speed in February:
5mph - Average wind speed in March:
5.2mph - Average wind speed in April:
5.8mph - Average wind speed in May:
5.6mph - Average wind speed in June:
5.2mph
- Average wind speed in July:
4.9mph - Average wind speed in August:
4.6mph - Average wind speed in September:
4.5mph - Average wind speed in October:
4.5mph - Average wind speed in November:
4.9mph - Average wind speed in December:
5.2mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest months (with the lowest average wind speed) are September and October (4.5mph).
Average humidity
Rosemead, CA
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).
Average rainfall
Rosemead, CA
- Average rainfall in January:
1.1" - Average rainfall in February:
1.3" - Average rainfall in March:
0.75" - Average rainfall in April:
0.39" - Average rainfall in May:
0.16" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.16" - Average rainfall in August:
0.08" - Average rainfall in September:
0.12" - Average rainfall in October:
0.16" - Average rainfall in November:
0.59" - Average rainfall in December:
1.22"
The wettest month (with the highest rainfall) is February (1.3").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
Rosemead, CA
- Average rainfall days in January:
4.4 days - Average rainfall days in February:
5.2 days - Average rainfall days in March:
5.5 days - Average rainfall days in April:
4.8 days - Average rainfall days in May:
3.7 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
3.1 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:
3.4 days - Average rainfall days in December:
4.8 days
The month with the highest number of rainy days is March (5.5 days).
The month with the least rainy days is June (1.2 days).
Average daylight / Average sunshine
Rosemead, 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:
6h and 5min - Average sunshine in February:
6h and 5min - Average sunshine in March:
8h and 5min - Average sunshine in April:
11h and 2min - Average sunshine in May:
11h and 4min - Average sunshine in June:
12h and 0min
- 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 4min - Average sunshine in November:
7h and 2min - Average sunshine in December:
6h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days
Rosemead, CA
- Average sunshine days in January:
25.6 days - Average sunshine days in February:
22.2 days - Average sunshine days in March:
25.5 days - Average sunshine days in April:
24.9 days - Average sunshine days in May:
25.7 days - Average sunshine days in June:
27.5 days
- Average sunshine days in July:
25.3 days - Average sunshine days in August:
27 days - Average sunshine days in September:
25.3 days - Average sunshine days in October:
26.7 days - Average sunshine days in November:
25.8 days - Average sunshine days in December:
25.3 days
The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is February (22.2 days).
Average UV index
Rosemead, CA
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover
Rosemead, CA
The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility
Rosemead, 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).
Rosemead, California, USA
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