Rockford, IL Weather by Month and Climate Averages

How much rain does Rockford get?

Rockford gets 37.2 in of precipitation in an average year, spread over about 121 days with measurable rain. That is more rainy days than 79% of the US.

June is the wettest month, with 5.2 in. January is the driest, with 1.6 in. May has the most rainy days, about 13.

The longest dry spell in the last five years lasted 27 days, to October 21, 2024.

See where Rockford ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Illinois.

Does it snow in Rockford?

Yes. Rockford gets about 37.1 in of snow in an average season, measured at the reporting station.

The snowiest winter on record is 1978–79, with 74.6 in.

The most recent measurable snow at the station fell on March 18, 2026.

See where Rockford ranks: snowiest cities in the US.

Rockford weather by month

Rockford weather in January

In January, Rockford averages a high of 29°F and a low of 14°F. It gets 1.6 in of precipitation over about 10 rainy days. The sun is out about 25% of daylight hours. The January record high is 63°F (2008) and the record low is -31°F (2019).

Rockford weather in February

In February, Rockford averages a high of 34°F and a low of 17°F. It gets 1.6 in of precipitation over about 9 rainy days. The sun is out about 43% of daylight hours. The February record high is 78°F (2024) and the record low is -24°F (1996).

Rockford weather in March

In March, Rockford averages a high of 47°F and a low of 28°F. It gets 2.4 in of precipitation over about 11 rainy days. The sun is out about 34% of daylight hours. The March record high is 85°F (1986) and the record low is -11°F (2014).

Rockford weather in April

In April, Rockford averages a high of 60°F and a low of 38°F. It gets 3.8 in of precipitation over about 12 rainy days. The sun is out about 38% of daylight hours. The April record high is 91°F (2002) and the record low is 5°F (1982).

Rockford weather in May

In May, Rockford averages a high of 71°F and a low of 49°F. It gets 4.2 in of precipitation over about 13 rainy days. The sun is out about 39% of daylight hours. The May record high is 99°F (2012) and the record low is 26°F (2005). May is one of the most comfortable months to visit.

Rockford weather in June

In June, Rockford averages a high of 81°F and a low of 59°F. It gets 5.2 in of precipitation over about 11 rainy days. The sun is out about 51% of daylight hours. The June record high is 101°F (1988) and the record low is 37°F (1993).

Rockford weather in July

In July, Rockford averages a high of 84°F and a low of 63°F. It gets 3.8 in of precipitation over about 9 rainy days. The sun is out about 48% of daylight hours. The July record high is 105°F (2012) and the record low is 45°F (1972).

Rockford weather in August

In August, Rockford averages a high of 82°F and a low of 61°F. It gets 4.2 in of precipitation over about 9 rainy days. The sun is out about 54% of daylight hours. The August record high is 104°F (1988) and the record low is 41°F (1986).

Rockford weather in September

In September, Rockford averages a high of 75°F and a low of 53°F. It gets 3.6 in of precipitation over about 8 rainy days. The sun is out about 54% of daylight hours. The September record high is 96°F (2012) and the record low is 27°F (1984). September is one of the most comfortable months to visit.

Rockford weather in October

In October, Rockford averages a high of 62°F and a low of 41°F. It gets 2.6 in of precipitation over about 10 rainy days. The sun is out about 50% of daylight hours. The October record high is 90°F (1971) and the record low is 17°F (1976). October is one of the most comfortable months to visit.

Rockford weather in November

In November, Rockford averages a high of 47°F and a low of 30°F. It gets 2.3 in of precipitation over about 9 rainy days. The sun is out about 43% of daylight hours. The November record high is 77°F (2016) and the record low is -10°F (1977).

Rockford weather in December

In December, Rockford averages a high of 34°F and a low of 20°F. It gets 1.9 in of precipitation over about 10 rainy days. The sun is out about 31% of daylight hours. The December record high is 69°F (2012) and the record low is -24°F (1983).

Sunshine, humidity and wind in Rockford

August is the sunniest month in Rockford, with sunshine about 54% of daylight hours. January is the cloudiest, at 25%. Over the year the sun shines about 43% of daylight hours. Rockford is cloudier than 77% of the US.

Humidity peaks in January at 79% and is lowest in June at 57%.

Wind averages 9 mph over the year, and April is the windiest month at 11 mph.

Rockford has about 16 days a year above 90°F. Rockford is cooler than 67% of the US.

Thunderstorms occur on about 43 days a year.

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

First and last freeze in Rockford

The first fall freeze in Rockford typically comes around October 11, and the last spring freeze around April 28. That leaves a frost-free growing season of about 166 days.

Rockford weather records

The hottest temperature on record at the Rockford station is 105°F, on July 7, 2012. The coldest is -31°F, on January 31, 2019.

The wettest day on record brought 5.7 in of rain, on August 14, 1987.

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

The annual mean temperature has changed by +0.6°F per decade since 1970.

The best time to visit Rockford

The most comfortable time to visit is typically May and September to October, when daytime highs sit near 70°F.

Winter (December–February) is cold, with average highs around 33°F and lows near 17°F. Snow is possible.

Spring (March–May) is mild, with average highs around 59°F and lows near 38°F.

Summer (June–August) is hot, with average highs around 82°F and lows near 61°F.

Autumn (September–November) is mild, with average highs around 62°F and lows near 41°F.

Rockford climate questions

How much rain does Rockford get?

Rockford gets 37.2 in of precipitation in an average year, over about 121 rainy days.

What is the wettest month in Rockford?

June is the wettest month in Rockford, with 5.2 in. January is the driest, with 1.6 in.

How many rainy days does Rockford have a year?

Rockford has about 121 days with measurable rain in an average year. May has the most, about 13.

Does it snow in Rockford?

Yes. Rockford gets about 37.1 in of snow in an average season. The snowiest winter on record is 1978–79, with 74.6 in.

What is the hottest month in Rockford?

July is the warmest month in Rockford, with an average high of 84°F.

What is the coldest month in Rockford?

January is the coldest month in Rockford, with an average low of 14°F.

What is the record high temperature in Rockford?

The record high at the Rockford station is 105°F, set on July 7, 2012. The record low is -31°F, on January 31, 2019.

What is the sunniest month in Rockford?

August is the sunniest month in Rockford, with sunshine about 54% of daylight hours. January is the cloudiest.

When is the first frost in Rockford?

The first fall freeze in Rockford typically comes around October 11. The last spring freeze is around April 28.

What is the best time to visit Rockford?

The most comfortable time to visit is typically May and September to October, when daytime highs sit near 70°F.