Norwalk (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Norwalk.
Climate overview of Norwalk
Temperatures in Norwalk, California, United States of America, shift moderately through the seasons. The warmest month is August at 30°C (86°F), and the coolest is December at 20°C (68°F).
Rainfall is extremely rare, with only 245 mm (9.6 in) falling across the entire year. Sunshine peaks in July, when the city sees around 12.1 hours of sunshine per day.
Norwalk Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Norwalk - and find the best time to visit.
Monthly Temperature in Norwalk
The weather in Norwalk changes moderately throughout the year, offering enough variation to appreciate each season. Average maximum daytime temperatures range from a very warm 30°C (86°F) in August, the warmest time of the year, to a pleasant 20°C (68°F) during cooler months like December.
At night, you can expect temperatures ranging from 19°C (66°F) in August to around 8°C (46°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Norwalk
Norwalk is known for its low rainfall, with yearly precipitation amounts around 245 mm (9.6 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives moderate rainfall, averaging 67 mm (2.6 in) of precipitation, recorded across 8 rainy days. In contrast, the driest month June brings less rainfall, with 0.2 mm (0.01 in) over 0 rainy days. For more details, please visit our Norwalk 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 Norwalk
Seasonal changes in sunshine hours are quite dramatic in Norwalk. While July receives considerable daily sunshine with up to 12.1 hours, November marks the darkest time of the year, where sunshine is scarce 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 Norwalk by Month
The relative humidity is high throughout the year in Norwalk.
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 Norwalk
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, July, October, November and December
- Warmest weather: July, August and September
- Most sunshine: July and August
- Fewer rainy days: May, June, July, August and September
- Seasonal pattern: a distinct dry season from March to November, with very warm summers and pleasant winters
Frequently asked questions about the climate in Norwalk
What is the best time to visit Norwalk?
January, February, March, April, May, June, July, October, November and December typically offer the most optimal weather in Norwalk. In contrast, August and September tend to have less optimal conditions. Norwalk has a distinct dry season from March to November, with very warm summers and pleasant winters.
What temperatures can I expect in Norwalk?
Daytime highs range from 20°C (68°F) in December to 30°C (86°F) in August. Nighttime lows range from 8°C (46°F) to 19°C (66°F).
How much rain does Norwalk get?
Annual rainfall is around 245 mm (9.6 in). December is the wettest month with 67 mm (2.6 in), while June is the driest with 0.2 mm (0.01 in).
How sunny is Norwalk?
Norwalk 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, Norwalk enjoys abundant sunshine.
Norwalk 3-Day Forecast
Norwalk (CA) 3-Day Forecast
Norwalk on the map
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