Climate and monthly weather forecastRosemont, CA
Climate and monthly weather forecast
Weather in January
January in Rosemont, California, is a moderate winter month, with an average temperature fluctuating between 56.1°F (13.4°C) and 40.8°F (4.9°C). The average high-temperature during January is a mild 56.1°F (13.4°C), almost matching the conditions of the preceding month. Weather in January »Weather in February
The last month of the winter, February, is also a moderate month in Rosemont, California, with temperature in the range of an average low of 41.5°F (5.3°C) and an average high of 59°F (15°C). Rosemont experiences a transition to a still moderate 59°F (15°C) in average high-temperatures with the arrival of February, not greatly differing from January's 56.1°F (13.4°C). Weather in February »Weather in March
The first month of the spring, March, is a refreshing month in Rosemont, California, with an average temperature ranging between min 43.5°F (6.4°C) and max 63°F (17.2°C). As February transitions into March, Rosemont records an average high-temperature of a comfortable 63°F (17.2°C), showing a gentle shift from the preceding month. Weather in March »Weather in April
April is a pleasant spring month in Rosemont, California, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 46.6°F (8.1°C). April witnesses a minor rise in the average high-temperature, transitioning from an enjoyable 63°F (17.2°C) in March to a pleasant 69.4°F (20.8°C). Weather in April »Weather in May
The last month of the spring, May, is a warm month in Rosemont, California, with an average temperature varying between 77.5°F (25.3°C) and 51.3°F (10.7°C). May signals a minor shift in the average high-temperature, moving from April's pleasant 69.4°F (20.8°C) to a moderately hot 77.5°F (25.3°C). Weather in May »Weather in June
June, the first month of the summer in Rosemont, is a tropical month, with an average temperature fluctuating between 88.3°F (31.3°C) and 56.8°F (13.8°C). June signals a shift in the average high-temperature, moving from May's warm 77.5°F (25.3°C) to a tropical 88.3°F (31.3°C). Weather in June »Weather in July
July, the same as June, in Rosemont, California, is a hot summer month, with an average temperature ranging between min 59.5°F (15.3°C) and max 94.5°F (34.7°C). July brings the highest temperatures, with an average high of 94.5°F (34.7°C) and an average low of 59.5°F (15.3°C). The heat index in July is appraised at a very hot 100.4°F (38°C). Weather in July »Weather in August
The last month of the summer, August, is also a hot month in Rosemont, California, with an average temperature varying between 59.9°F (15.5°C) and 93.4°F (34.1°C). August begins with an average high-temperature of a still tropical 93.4°F (34.1°C), reflecting close similarity to the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Rosemont, is still a tropical month, with an average temperature fluctuating between 88.3°F (31.3°C) and 58.8°F (14.9°C). With the arrival of September, Rosemont's average high-temperature registers at a still tropical 88.3°F (31.3°C), indicating a subtle variation from the previous month. Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Rosemont, California, with an average temperature varying between 53.6°F (12°C) and 76.1°F (24.5°C). As Rosemont, California, enters October, the average high-temperature decreases from the a hot 88.3°F (31.3°C) of September to a warm 76.1°F (24.5°C). Weather in October »Weather in November
November, the last month of the autumn in Rosemont, is another comfortable month, with an average temperature ranging between min 45.9°F (7.7°C) and max 63.5°F (17.5°C). November brings a drop in Rosemont's average high-temperature, falling from a warm 76.1°F (24.5°C) in October to a refreshing 63.5°F (17.5°C). Weather in November »Weather in December
December, the first month of the winter in Rosemont, is still a cool month, with an average temperature fluctuating between 40.8°F (4.9°C) and 54.3°F (12.4°C). In Rosemont, the month of December registers the lowest temperatures, averaging 54.3°F (12.4°C) at the peak and 40.8°F (4.9°C) at the lowest. Weather in December »Updated: Feb 10, 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 Rosemont, California, during the entire year, the rain falls for 70.5 days and collects up to 15.04" (382mm) of precipitation.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.
March is the most humid month, with an average relative humidity of 75%.
March is the month with the most rainfall. Rain falls for 12.6 days and accumulates 2.72" (69mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Rosemont, 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.
June has the longest days of the year, with an average of 14h and 48min of daylight.
The months with the highest UV index in Rosemont are June and July, with an average maximum UV index of 7.
July is the warmest month, exhibiting average temperatures of 94.5°F (34.7°C) at the peak and 59.5°F (15.3°C) at the base.
July and September, with an average relative humidity of 44%, are the least humid months in Rosemont, California.
The months with the least rainfall are July and August Rain falls for 1 days and accumulates 0.04" (1mm) of rain.
With an average of 12.1h of sunshine, July has the most sunshine of the year in Rosemont.
December, noted for its average high-temperature of 54.3°F (12.4°C) and an average low-temperature of 40.8°F (4.9°C), is considered the coldest month in Rosemont, California.
The month with the shortest days in Rosemont is December, with an average of 9h and 30min of daylight.
With an average of 5.8h of sunshine, December has the least sunshine of the year in Rosemont.
Average temperature
Rosemont, CA
The warmest month (with the highest average high temperature) is July (94.5°F).
The month with the lowest average high temperature is December (54.3°F).
The month with the highest average low temperature is August (59.9°F).
The coldest months (with the lowest average low temperature) are January and December (40.8°F).
Average pressure
Rosemont, CA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.02"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.9"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:
30.08"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Rosemont, CA
- Average wind speed in January:
4.8mph - Average wind speed in February:
5.7mph - Average wind speed in March:
5.4mph - Average wind speed in April:
5.2mph - Average wind speed in May:
5.2mph - Average wind speed in June:
5.1mph
- Average wind speed in July:
4.9mph - Average wind speed in August:
4.6mph - Average wind speed in September:
4.1mph - Average wind speed in October:
4.4mph - Average wind speed in November:
4.3mph - Average wind speed in December:
5mph
The windiest month (with the highest average wind speed) is February (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.1mph).
Average humidity
Rosemont, CA
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are July and September (44%).
Average rainfall
Rosemont, CA
- Average rainfall in January:
2.2" - Average rainfall in February:
2.6" - Average rainfall in March:
2.72" - Average rainfall in April:
1.18" - Average rainfall in May:
0.87" - Average rainfall in June:
0.2"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.16" - Average rainfall in October:
0.79" - Average rainfall in November:
1.65" - Average rainfall in December:
2.6"
The wettest month (with the highest rainfall) is March (2.72").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days
Rosemont, CA
- Average rainfall days in January:
8.7 days - Average rainfall days in February:
8.6 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
8.3 days - Average rainfall days in May:
5.3 days - Average rainfall days in June:
1.6 days
- Average rainfall days in July:
1 days - Average rainfall days in August:
1.6 days - Average rainfall days in September:
2.1 days - Average rainfall days in October:
3.5 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is July (1 days).
Average daylight / Average sunshine
Rosemont, 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 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:
6h and 0min - Average sunshine in February:
6h and 12min - Average sunshine in March:
7h and 36min - Average sunshine in April:
10h and 6min - Average sunshine in May:
11h and 0min - Average sunshine in June:
11h and 48min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
12h and 0min - Average sunshine in September:
11h and 12min - Average sunshine in October:
7h and 12min - Average sunshine in November:
6h and 30min - Average sunshine in December:
5h and 48min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days
Rosemont, CA
- Average sunshine days in January:
21.6 days - Average sunshine days in February:
19.2 days - Average sunshine days in March:
17.6 days - Average sunshine days in April:
20.8 days - Average sunshine days in May:
25.3 days - Average sunshine days in June:
27.9 days
- Average sunshine days in July:
29.7 days - Average sunshine days in August:
29 days - Average sunshine days in September:
27.5 days - Average sunshine days in October:
26.7 days - Average sunshine days in November:
22.6 days - Average sunshine days in December:
20.1 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (17.6 days).
Average UV index
Rosemont, CA
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
Rosemont, CA
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility
Rosemont, 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).
