Rockford, ID climate
Rockford has chilly winters and warm summers, with very little rain. A typical July afternoon reaches 88°, a January night drops to 15°, and about 28 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Rockford feels like
Winter
Spring
Summer
Fall
Rockford weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 32° | 15° | 1.0" | 6.4" | 10 | 20 | 13° – 32° |
| February | 37° | 18° | 0.7" | 5.7" | 8 | 15 | 17° – 37° |
| March | 49° | 27° | 0.9" | 3.0" | 8 | 4 | 32° – 43° |
| April | 58° | 32° | 1.0" | 1.3" | 9 | 1 | 41° – 50° |
| May | 68° | 40° | 1.5" | 0.3" | 9 | 0 | 48° – 60° |
| June | 77° | 47° | 1.0" | 0 | 6 | 0 | 57° – 68° |
| July | 88° | 53° | 0.5" | 0 | 3 | 0 | 60° – 76° |
| August | 87° | 51° | 0.6" | 0 | 4 | 0 | 62° – 73° |
| September | 76° | 43° | 0.8" | 0 | 5 | 0 | 55° – 63° |
| October | 61° | 32° | 0.9" | 0.9" | 7 | 1 | 38° – 53° |
| November | 45° | 23° | 0.7" | 3.0" | 8 | 5 | 24° – 40° |
| December | 32° | 15° | 1.1" | 7.5" | 11 | 19 | 18° – 30° |
| Year | 59° | 33° | 10.6" | 28.1" | 88 | 64 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Rockford
Rockford gets 11 inches of rain and melted snow a year. May is the wettest month and July the driest. Rain or snow falls on about 88 days a year. Snow covers the ground about 64 days of the year.
About 119 frost-free days a year
In half of years the last 32° night comes by May 20 and the first one by September 20. That leaves about 119 frost-free days for gardens, shorter than 97% of U.S. towns.
Heating and cooling a home in Rockford
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rockford, 96% of that work is heating and 4% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Rockford compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Rockford averaged 1.1° warmer than the 1900s. The biggest change is in March (+3.0°). The shift is smaller than in 59% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rockford’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 17° to 37°. September is the most reliable, staying within 8°.
Common questions about Rockford’s climate
What is the coldest month in Rockford?
January, with a typical high of 32° and a low of 15°.
What is the hottest month in Rockford?
July, with a typical high of 88° and a low of 53°. About 26 days a year reach 90°.
How much snow does Rockford get?
About 28 inches in a normal winter, most of it in December.
When is the first frost in Rockford?
In half of years the first 32° night comes by September 20, and the last spring frost by May 20.
What is the rainiest month in Rockford?
May, with 1.5 inches of rain and melted snow. The year totals 11 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rockford itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Ft Hall 1 Nne, ID (12 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.