Rexburg, ID climate
Rexburg has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 84°, a January night drops to 12°, and about 70 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decade6° warmer than normal today. The forecast high is 72°, and a typical Sep 30 in Rexburg peaks around 66°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Rexburg feels like
Winter
Spring
Summer
Fall
Rexburg 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 | 28° | 12° | 1.2" | 19.8" | 9 | 31 | 13° – 28° |
| February | 34° | 15° | 0.8" | 10.7" | 7 | 29 | 15° – 34° |
| March | 45° | 24° | 1.0" | 5.3" | 7 | 25 | 26° – 42° |
| April | 56° | 31° | 1.3" | 2.0" | 7 | 4 | 37° – 49° |
| May | 66° | 39° | 1.9" | 0 | 8 | 0 | 46° – 57° |
| June | 75° | 45° | 1.5" | 0 | 6 | 0 | 54° – 65° |
| July | 84° | 50° | 0.6" | 0 | 3 | 0 | 58° – 74° |
| August | 83° | 49° | 0.8" | 0 | 4 | 0 | 60° – 69° |
| September | 73° | 41° | 1.1" | 0 | 5 | 0 | 53° – 61° |
| October | 58° | 31° | 1.2" | 1.6" | 5 | 1 | 37° – 51° |
| November | 42° | 22° | 0.9" | 10.5" | 7 | 10 | 22° – 40° |
| December | 29° | 13° | 1.2" | 20.2" | 10 | 26 | 15° – 29° |
| Year | 56° | 31° | 13.2" | 70.1" | 78 | 125 |
“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 Rexburg
Rexburg gets 13 inches of rain and melted snow a year. May is the wettest month and July the driest. Rain or snow falls on about 78 days a year. Snow covers the ground about 125 days of the year.
About 129 frost-free days a year
In half of years the last 32° night comes by May 15 and the first one by September 23. That leaves about 129 frost-free days for gardens, shorter than 95% of U.S. towns.
Heating and cooling a home in Rexburg
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rexburg, 97% of that work is heating and 3% 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 Rexburg 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 Rexburg averaged 1.4° warmer than the 1900s. The biggest change is in March (+3.9°). The shift is larger than in 62% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rexburg’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 15° to 34°. September is the most reliable, staying within 8°.
Common questions about Rexburg’s climate
What is the coldest month in Rexburg?
January, with a typical high of 28° and a low of 12°.
What is the hottest month in Rexburg?
July, with a typical high of 84° and a low of 50°. About 18 days a year reach 90°.
How much snow does Rexburg get?
About 70 inches in a normal winter, most of it in December.
When is the first frost in Rexburg?
In half of years the first 32° night comes by September 23, and the last spring frost by May 15.
What is the rainiest month in Rexburg?
May, with 1.9 inches of rain and melted snow. The year totals 13 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rexburg itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Ashton 1n, ID (24 mi, snow) and Rexburg Madison Co Airport, ID (1 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.