Photo: Ken Lund from Reno, Nevada, USA · CC BY-SA 2.0Dry weather: only 13 inches of rain and melted snow a year in Rexburg, less than in 95% of U.S. towns
Expect July afternoons of about 84°. From frosty January to warm July, readings climb 72°. By January nights alone, it runs colder than 91% of U.S. towns. Plan time outside for June, August and September, when highs sit at 73–83°.
A year in Rexburg at a glance
Each month’s typical high and low, and what it brings.
What stands out about Rexburg’s climate
Compared with towns across the U.S., with Rexburg’s place in Idaho beside it.
What a year in Rexburg feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 129 frost-free days a year
In half of years the last 32° night comes by May 15 and the first by September 23. Day counts come from NOAA’s station at Rexburg Byu Idaho, ID, 1.0 miles from the town’s center, 140 ft higher; frost dates and degree days from Rexburg Madison Co Airport, 1.0 miles away.
The 2023 USDA map puts Rexburg’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −16°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 70 inches of snow a winter
Snow, measured at Ashton 1n, ID, falls mostly in January and December. Precipitation (rain plus melted snow) adds up to 13 inches a year; May is the wettest month and July the driest. Rain or snow falls on about 78 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Rexburg
97% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Rexburg Madison Co Airport.
Living with Rexburg’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
129 frost-free days in zone 5a. The last frost comes by May 15 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 23.
Months with highs of 62–84° and lows of 40° or more: June, August and September. 9.3 miles of trails are waiting.
Parks & trails →Cold waves are 31% of the yearly building losses FEMA expects in Rexburg from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Rexburg and similar climates
TownRatings has no climate map of the towns around Rexburg yet.
Climates most like Rexburg’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Rexburg, ID | 12° | 84° | 13" | 70" |
| Great Falls, MT | 13° | 84° | 13" | 66" |
| Cheyenne, WY | 16° | 85° | 15" | 65" |
| Durango, CO | 12° | 86° | 18" | 64" |
| Flagstaff, AZ | 16° | 84° | 18" | 90" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
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°).
A bigger shift than in 51% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Rexburg compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Rexburg’s place among Idaho’s.
Rexburg weather by month
Highs, lows and precipitation from NOAA’s grid at Rexburg’s center; snow, wet days and snow on the ground from Ashton 1n, ID. 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" | 0.0" | 8 | 0 | 46° – 57° |
| June | 75° | 45° | 1.5" | 0.0" | 6 | 0 | 54° – 65° |
| July | 84° | 50° | 0.6" | 0.0" | 3 | 0 | 58° – 74° |
| August | 83° | 49° | 0.8" | 0.0" | 4 | 0 | 60° – 69° |
| September | 73° | 41° | 1.1" | 0.0" | 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 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 15° to 34°. September is the most reliable, staying within 8°.
Where Rexburg’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Rexburg’s center.
- Snow: Ashton 1n, ID.
- Frost dates, heating and cooling: Rexburg Madison Co Airport, 1.0 miles away.
- Freezing nights, 90° and 100° days: Rexburg Byu Idaho, ID, 1.0 miles from the town’s center, 140 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Rexburg’s climate
What is the weather like in Rexburg?
A typical July afternoon reaches 84°, a January night drops to 12°, and about 70 inches of snow falls in a normal winter. Colder January nights than 91% of U.S. towns; cooler July afternoons than 56% of U.S. towns.
How cold does it get in Rexburg in winter?
January nights average 12°. About 184 nights a year reach 32° or below and 14 reach 0° or below. In the coldest January of the last 30 years the month averaged 13°.
How much snow does Rexburg get?
About 70 inches in a normal winter at Ashton 1n, ID, most of it in January and December, with snow on the ground about 125 days a year.
How hot does it get in Rexburg?
July, with a typical high of 84° and a low of 50°. About 16 days a year reach 90° (Rexburg Madison Co Airport).
When is the first and last frost in Rexburg?
In half of years the last spring frost (32°) comes by May 15 and the first fall frost by September 23, about 129 frost-free days, at Rexburg Madison Co Airport.
What growing zone is Rexburg in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −16°.
What is the best time of year to visit Rexburg?
By one simple rule (highs of 62–84° and lows of 40° or more), June, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Rexburg getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 51% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Rexburg.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.