Richland (WA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Richland.
Climate overview of Richland
The climate in Richland, Washington State, United States of America, is marked by large temperature swings across the seasons, ranging from 33°C (91°F) in July to 4°C (39°F) in December.
Rain/snowfall is extremely rare, with only 175 mm (6.9 in) falling across the entire year.
Richland Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Richland - and find the best time to visit.
Monthly Temperature in Richland
In Richland, temperatures differ significantly between summer and winter months. Average maximum daytime temperatures range from a very warm 33°C (91°F) in July, the warmest time of the year, to a chilly 4°C (39°F) during cooler months like December.
At night, you can expect temperatures ranging from 16°C (61°F) in July to around -3°C (27°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Richland
Richland sits in an arid zone with minimal moisture, averaging 175 mm (6.9 in) of rain/snowfall per year. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives low snow/rainfall, averaging 29 mm (1.1 in) of precipitation, recorded across 12 snowy/rainy days. In contrast, the driest month July brings less rainfall, with 2.6 mm (0.1 in) over 2 rainy days. For more details, please visit our Richland Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Richland
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, June, September and October
- Warmest weather: July and August
- Fewest rainy days: July, August and September
- Seasonal pattern: Very little rainfall year-round, with very warm summers and cold winters
- Coldest conditions: December, with freezing nights around -3°C (27°F).
Frequently asked questions about the climate in Richland
What is the best time to visit Richland?
April, May, June, September and October typically offer the most optimal weather in Richland. In contrast, December tends to have less optimal conditions. Richland has very little rainfall year-round, with very warm summers and cold winters.
What temperatures can I expect in Richland?
Daytime highs range from 4°C (39°F) in December to 33°C (91°F) in July. Nighttime lows range from -3°C (27°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Richland get?
Annual rainfall is around 175 mm (6.9 in). December is the wettest month with 29 mm (1.1 in), while July is the driest with 2.6 mm (0.1 in). In the coldest months, precipitation may fall as snow/rain.
Richland 3-Day Forecast
Richland (WA) 3-Day Forecast
Richland on the map
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