Rosemead (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Rosemead.
Climate overview of Rosemead
Rosemead, California, United States of America, sees big temperature differences between seasons, with August peaking at 32°C (90°F) and December dropping to 20°C (68°F).
With around 302 mm (12 in) of annual rainfall, Rosemead has a fairly dry climate. However, it has a distinct dry season from April to November, with very warm summers and pleasant winters. The wettest month is December, while August sees the least rain. The most sunshine falls in July, with an average of 12.1 hours of daily sunshine.
Rosemead Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rosemead - and find the best time to visit.
Monthly Temperature in Rosemead
Visitors to Rosemead can expect significant temperature changes throughout the year. Average daytime temperatures reach a very warm 32°C (90°F) in August. In December, the coolest month of the year, temperatures drop to a pleasant 20°C (68°F).
At night, temperatures range from around 18°C (64°F) in August to 8°C (46°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Rosemead
Rosemead's climate is marked by below-average rainfall, accumulating 302 mm (12 in) of precipitation yearly. Rosemead can be quite wet during December, receiving approximately 80 mm (3.1 in) of precipitation over 8 rainy days.
In contrast, during the driest month (August), you will experience much drier conditions, with 0.3 mm (0.01 in) of precipitation spread across 0 rainy days. For more details, please visit our Rosemead Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Rosemead
Rosemead can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 12.1 hours of sunshine daily. In contrast, the city experiences much darker days in November, with only 7.2 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Rosemead by Month
The relative humidity is high throughout the year in Rosemead.
The city experiences its highest humidity in May, reaching 73%. In November, the humidity drops to its lowest level at 50%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Rosemead
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, April, May, June, October, November and December
- Warmest weather: July, August and September
- Most sunshine: July and August
- Fewest rainy days: June, July, August and September
- Seasonal pattern: A distinct dry season from April to November, with very warm summers and pleasant winters
Frequently asked questions about the climate in Rosemead
What is the best time to visit Rosemead?
January, February, March, April, May, June, October, November and December typically offer the most optimal weather in Rosemead. In contrast, July, August and September tend to have less optimal conditions. Rosemead has a distinct dry season from April to November, with very warm summers and pleasant winters.
What temperatures can I expect in Rosemead?
Daytime highs range from 20°C (68°F) in December to 32°C (90°F) in August. Nighttime lows range from 8°C (46°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Rosemead get?
Annual rainfall is around 302 mm (12 in). December is the wettest month with 80 mm (3.1 in), while August is the driest with 0.3 mm (0.01 in).
How sunny is Rosemead?
Rosemead receives around 3,257 hours of sunshine per year. July is the sunniest month with 364 hours, while November is the cloudiest with just 217 hours. Overall, Rosemead enjoys abundant sunshine.
Rosemead 3-Day Forecast
Rosemead (CA) 3-Day Forecast
Rosemead on the map
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