Dayton, OH Weather by Month and Climate Averages

How much rain does Dayton get?

Dayton gets 41.6 in of precipitation in an average year, spread over about 128 days with measurable rain. That is more rainy days than 84% of the US.

April is the wettest month, with 4.5 in. February is the driest, with 2.4 in. May has the most rainy days, about 13.

The longest dry spell in the last five years lasted 17 days, to June 6, 2023.

See where Dayton ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Ohio.

Does it snow in Dayton?

Yes. Dayton gets about 12.3 in of snow in an average season, measured at the reporting station.

The snowiest winter on record is 1977–78, with 62.8 in.

The most recent measurable snow at the station fell on March 16, 2026.

See where Dayton ranks: snowiest cities in the US.

Dayton weather by month

Dayton weather in January

In January, Dayton averages a high of 37°F and a low of 22°F. It gets 3.2 in of precipitation over about 12 rainy days. The sun is out about 26% of daylight hours. The January record high is 70°F (2020) and the record low is -21°F (1985).

Dayton weather in February

In February, Dayton averages a high of 41°F and a low of 25°F. It gets 2.4 in of precipitation over about 10 rainy days. The sun is out about 36% of daylight hours. The February record high is 77°F (2018) and the record low is -10°F (2019).

Dayton weather in March

In March, Dayton averages a high of 51°F and a low of 32°F. It gets 3.5 in of precipitation over about 11 rainy days. The sun is out about 36% of daylight hours. The March record high is 88°F (2012) and the record low is 2°F (1980).

Dayton weather in April

In April, Dayton averages a high of 65°F and a low of 43°F. It gets 4.5 in of precipitation over about 13 rainy days. The sun is out about 39% of daylight hours. The April record high is 90°F (1986) and the record low is 18°F (1972).

Dayton weather in May

In May, Dayton averages a high of 75°F and a low of 54°F. It gets 4.4 in of precipitation over about 13 rainy days. The sun is out about 36% of daylight hours. The May record high is 97°F (2010) and the record low is 29°F (2020). May is one of the most comfortable months to visit.

Dayton weather in June

In June, Dayton averages a high of 84°F and a low of 64°F. It gets 4.4 in of precipitation over about 12 rainy days. The sun is out about 45% of daylight hours. The June record high is 103°F (1994) and the record low is 42°F (1990).

Dayton weather in July

In July, Dayton averages a high of 88°F and a low of 68°F. It gets 4.0 in of precipitation over about 10 rainy days. The sun is out about 48% of daylight hours. The July record high is 105°F (2012) and the record low is 51°F (1988).

Dayton weather in August

In August, Dayton averages a high of 86°F and a low of 65°F. It gets 3.1 in of precipitation over about 8 rainy days. The sun is out about 49% of daylight hours. The August record high is 103°F (1999) and the record low is 45°F (1986).

Dayton weather in September

In September, Dayton averages a high of 80°F and a low of 58°F. It gets 3.0 in of precipitation over about 8 rainy days. The sun is out about 55% of daylight hours. The September record high is 99°F (2011) and the record low is 35°F (1989). September is one of the most comfortable months to visit.

Dayton weather in October

In October, Dayton averages a high of 67°F and a low of 45°F. It gets 3.0 in of precipitation over about 9 rainy days. The sun is out about 51% of daylight hours. The October record high is 98°F (2019) and the record low is 24°F (1976). October is one of the most comfortable months to visit.

Dayton weather in November

In November, Dayton averages a high of 53°F and a low of 35°F. It gets 3.0 in of precipitation over about 10 rainy days. The sun is out about 45% of daylight hours. The November record high is 81°F (1999) and the record low is 7°F (2019).

Dayton weather in December

In December, Dayton averages a high of 41°F and a low of 27°F. It gets 3.1 in of precipitation over about 11 rainy days. The sun is out about 29% of daylight hours. The December record high is 75°F (1998) and the record low is -16°F (1989).

Sunshine, humidity and wind in Dayton

September is the sunniest month in Dayton, with sunshine about 55% of daylight hours. January is the cloudiest, at 26%. Over the year the sun shines about 41% of daylight hours. Dayton is cloudier than 84% of the US.

Humidity peaks in January at 73% and is lowest in April at 60%.

Dayton has about 33 days a year above 90°F. Dayton is hotter than 54% of the US.

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

First and last freeze in Dayton

The first fall freeze in Dayton typically comes around November 1, and the last spring freeze around April 11. That leaves a frost-free growing season of about 204 days.

Dayton weather records

The hottest temperature on record at the Dayton station is 105°F, on July 7, 2012. The coldest is -21°F, on January 20, 1985.

The wettest day on record brought 4.7 in of rain, on September 14, 1979.

34 all-time records have been set at the station since 1970.

The annual mean temperature has changed by +0.3°F per decade since 1970.

The best time to visit Dayton

The most comfortable time to visit is typically May and September to October, when daytime highs sit near 74°F.

Winter (December–February) is cold, with average highs around 40°F and lows near 24°F. Snow is possible.

Spring (March–May) is mild, with average highs around 64°F and lows near 43°F.

Summer (June–August) is hot, with average highs around 86°F and lows near 66°F. It can feel humid.

Autumn (September–November) is mild, with average highs around 66°F and lows near 46°F.

Dayton climate questions

How much rain does Dayton get?

Dayton gets 41.6 in of precipitation in an average year, over about 128 rainy days.

What is the wettest month in Dayton?

April is the wettest month in Dayton, with 4.5 in. February is the driest, with 2.4 in.

How many rainy days does Dayton have a year?

Dayton has about 128 days with measurable rain in an average year. May has the most, about 13.

Does it snow in Dayton?

Yes. Dayton gets about 12.3 in of snow in an average season. The snowiest winter on record is 1977–78, with 62.8 in.

What is the hottest month in Dayton?

July is the warmest month in Dayton, with an average high of 88°F.

What is the coldest month in Dayton?

January is the coldest month in Dayton, with an average low of 22°F.

What is the record high temperature in Dayton?

The record high at the Dayton station is 105°F, set on July 7, 2012. The record low is -21°F, on January 20, 1985.

What is the sunniest month in Dayton?

September is the sunniest month in Dayton, with sunshine about 55% of daylight hours. January is the cloudiest.

When is the first frost in Dayton?

The first fall freeze in Dayton typically comes around November 1. The last spring freeze is around April 11.

What is the best time to visit Dayton?

The most comfortable time to visit is typically May and September to October, when daytime highs sit near 74°F.