Renton, WA Weather by Month and Climate Averages

How much rain does Renton get?

Renton gets 34.7 in of precipitation in an average year, spread over about 153 days with measurable rain. That is more rainy days than 95% of the US.

November is the wettest month, with 5.6 in. July is the driest, with 0.6 in. January has the most rainy days, about 18.

The longest dry spell in the last five years lasted 43 days, to August 18, 2022.

See where Renton ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Washington.

Renton weather by month

Renton weather in January

In January, Renton averages a high of 48°F and a low of 37°F. It gets 4.9 in of precipitation over about 18 rainy days. The sun is out about 15% of daylight hours. The January record high is 64°F (2018) and the record low is 17°F (2024).

Renton weather in February

In February, Renton averages a high of 50°F and a low of 37°F. It gets 3.2 in of precipitation over about 16 rainy days. The sun is out about 24% of daylight hours. The February record high is 66°F (2016) and the record low is 18°F (2019).

Renton weather in March

In March, Renton averages a high of 54°F and a low of 39°F. It gets 3.7 in of precipitation over about 18 rainy days. The sun is out about 28% of daylight hours. The March record high is 79°F (2019) and the record low is 25°F (2009).

Renton weather in April

In April, Renton averages a high of 59°F and a low of 43°F. It gets 2.8 in of precipitation over about 14 rainy days. The sun is out about 35% of daylight hours. The April record high is 87°F (2016) and the record low is 31°F (2008).

Renton weather in May

In May, Renton averages a high of 66°F and a low of 49°F. It gets 1.9 in of precipitation over about 11 rainy days. The sun is out about 34% of daylight hours. The May record high is 92°F (2023) and the record low is 37°F (2011). May is one of the most comfortable months to visit.

Renton weather in June

In June, Renton averages a high of 71°F and a low of 54°F. It gets 1.5 in of precipitation over about 9 rainy days. The sun is out about 41% of daylight hours. The June record high is 109°F (2021) and the record low is 44°F (2002). June is one of the most comfortable months to visit.

Renton weather in July

In July, Renton averages a high of 77°F and a low of 58°F. It gets 0.6 in of precipitation over about 4 rainy days. The sun is out about 64% of daylight hours. The July record high is 105°F (2009) and the record low is 49°F (2000). July is one of the most comfortable months to visit.

Renton weather in August

In August, Renton averages a high of 78°F and a low of 58°F. It gets 0.9 in of precipitation over about 5 rainy days. The sun is out about 56% of daylight hours. The August record high is 98°F (2020) and the record low is 47°F (2003). August is one of the most comfortable months to visit.

Renton weather in September

In September, Renton averages a high of 71°F and a low of 53°F. It gets 1.5 in of precipitation over about 9 rainy days. The sun is out about 47% of daylight hours. The September record high is 91°F (2020) and the record low is 40°F (2000). September is one of the most comfortable months to visit.

Renton weather in October

In October, Renton averages a high of 61°F and a low of 47°F. It gets 3.5 in of precipitation over about 15 rainy days. The sun is out about 36% of daylight hours. The October record high is 86°F (2022) and the record low is 28°F (2003).

Renton weather in November

In November, Renton averages a high of 52°F and a low of 40°F. It gets 5.6 in of precipitation over about 17 rainy days. The sun is out about 25% of daylight hours. The November record high is 75°F (2010) and the record low is 14°F (2010).

Renton weather in December

In December, Renton averages a high of 47°F and a low of 37°F. It gets 4.5 in of precipitation over about 17 rainy days. The sun is out about 18% of daylight hours. The December record high is 68°F (2014) and the record low is 15°F (2013).

Sunshine, humidity and wind in Renton

July is the sunniest month in Renton, with sunshine about 64% of daylight hours. January is the cloudiest, at 15%. Over the year the sun shines about 35% of daylight hours. Renton is cloudier than 96% of the US.

Humidity peaks in December at 85% and is lowest in July at 67%.

Wind averages 5 mph over the year, and March is the windiest month at 6 mph.

Renton has about 5 days a year above 90°F. Renton is cooler than 90% of the US.

Thunderstorms occur on about 3 days a year.

See where Renton ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.

First and last freeze in Renton

The first fall freeze in Renton typically comes around November 13, and the last spring freeze around March 18. That leaves a frost-free growing season of about 240 days.

Renton weather records

The hottest temperature on record at the Renton station is 109°F, on June 28, 2021. The coldest is 14°F, on November 24, 2010.

The wettest day on record brought 4.5 in of rain, on October 20, 2003.

The best time to visit Renton

The most comfortable time to visit is typically May to September, when daytime highs sit near 73°F.

Winter (December–February) is chilly, with average highs around 48°F and lows near 37°F.

Spring (March–May) is mild, with average highs around 60°F and lows near 44°F.

Summer (June–August) is warm, with average highs around 75°F and lows near 57°F. It can feel humid.

Autumn (September–November) is mild, with average highs around 62°F and lows near 47°F.

Renton climate questions

How much rain does Renton get?

Renton gets 34.7 in of precipitation in an average year, over about 153 rainy days.

What is the wettest month in Renton?

November is the wettest month in Renton, with 5.6 in. July is the driest, with 0.6 in.

How many rainy days does Renton have a year?

Renton has about 153 days with measurable rain in an average year. January has the most, about 18.

What is the hottest month in Renton?

August is the warmest month in Renton, with an average high of 78°F.

What is the coldest month in Renton?

January is the coldest month in Renton, with an average low of 37°F.

What is the record high temperature in Renton?

The record high at the Renton station is 109°F, set on June 28, 2021. The record low is 14°F, on November 24, 2010.

What is the sunniest month in Renton?

July is the sunniest month in Renton, with sunshine about 64% of daylight hours. January is the cloudiest.

When is the first frost in Renton?

The first fall freeze in Renton typically comes around November 13. The last spring freeze is around March 18.

What is the best time to visit Renton?

The most comfortable time to visit is typically May to September, when daytime highs sit near 73°F.