Rexburg, Idaho climate: Normal weather by month, frost dates and records
Rexburg's normal year runs from 13°F January nights to 85°F July afternoons, with 12.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.7°C, January lows of −11°C, July highs of 29°C, 304 mm of precipitation a year.
- NOAA stationRexburg Madison County Airport
- Station IDUSW00094194
- Location43.83°N 111.80°W
- Elevation4,858 ft (1,481 m)
- From the center1 miles
- Population40,695
On October 14, the normal high in Rexburg is 58°F and the normal low 33°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Rexburg.
- Jan 28° 13°
- Feb 32° 16°
- Mar 45° 25°
- Apr 56° 32°
- May 66° 40°
- Jun 74° 46°
- Jul 85° 52°
- Aug 84° 50°
- Sep 73° 42°
- Oct 57° 32°
- Nov 41° 23°
- Dec 29° 14°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Rexburg each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 13°F. The most precipitation falls in May (1.71 in), the least in July (0.38 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 28°F | 13°F | 20.3°F | 1.05 | 11 | <1 | 31 | 9 h 20 min |
| February | 32°F | 16°F | 24.1°F | 0.69 | 8 | <1 | 27 | 10 h 30 min |
| March | 45°F | 25°F | 35.1°F | 0.89 | 8 | <1 | 26 | 11 h 50 min |
| April | 56°F | 32°F | 43.9°F | 1.52 | 9 | <1 | 16 | 13 h 20 min |
| May | 66°F | 40°F | 52.9°F | 1.71 | 10 | <1 | 5 | 14 h 40 min |
| June | 74°F | 46°F | 60.3°F | 1.43 | 8 | 1 | <1 | 15 h 30 min |
| July | 85°F | 52°F | 68.2°F | 0.38 | 4 | 9 | <1 | 15 h 10 min |
| August | 84°F | 50°F | 66.9°F | 0.75 | 5 | 8 | <1 | 14 h |
| September | 73°F | 42°F | 57.4°F | 0.78 | 5 | 1 | 2 | 12 h 30 min |
| October | 57°F | 32°F | 44.8°F | 1.03 | 7 | <1 | 17 | 11 h 10 min |
| November | 41°F | 23°F | 32.1°F | 0.75 | 8 | <1 | 26 | 9 h 40 min |
| December | 29°F | 14°F | 21.8°F | 0.99 | 10 | <1 | 30 | 9 h |
| Year (annual) | 56°F | 32°F | 44.0°F | 11.97 | 92 | 18 | 181 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −2°C | −11°C | −6.5°C | 27 mm |
| February | 0°C | −9°C | −4.4°C | 18 mm |
| March | 7°C | −4°C | 1.7°C | 23 mm |
| April | 13°C | 0°C | 6.6°C | 39 mm |
| May | 19°C | 4°C | 11.6°C | 43 mm |
| June | 23°C | 8°C | 15.7°C | 36 mm |
| July | 29°C | 11°C | 20.1°C | 10 mm |
| August | 29°C | 10°C | 19.4°C | 19 mm |
| September | 23°C | 5°C | 14.1°C | 20 mm |
| October | 14°C | 0°C | 7.1°C | 26 mm |
| November | 5°C | −5°C | 0.1°C | 19 mm |
| December | −1°C | −10°C | −5.7°C | 25 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Ashton (24 miles away), gets 70 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094194; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Rexburg?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (4).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094194.
When is the last frost in Rexburg?
In Rexburg, the last spring frost (32°F) comes after May 15 in half of years and after June 3 in one year in ten; the first autumn frost comes before September 23 in half of years and before September 8 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 151 year in 10 after June 3; 9 in 10 after May 1
- First autumn frost, half of years before
- September 231 year in 10 before September 8; 9 in 10 before October 7
NOAA puts the median frost-free season at 129 days, and the season without a hard freeze (28°F) at 157 days.
A hard freeze (28°F) comes after May 1 in half of springs and before October 5 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Rexburg in zone 5a in ZIP code 83460. By the map's own method, the average of each year's coldest night over 1991-2020, Rexburg's NOAA station is in zone 5b: the coldest night of a typical year reaches −14°F (22 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Idaho · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00094194; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Rexburg?
In a normal year in Rexburg, 18 days a year reach 90°F, 181 nights fall to 32°F or colder and 92 days bring measurable precipitation.
- Days at 90°F or more
- 18a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 181a normal year
- Days that stay below freezing
- 65high of 32°F or less
- Days with 0.01 inch of precipitation
- 92a normal year
The highest temperature in this station's record (since 1998) is 101°F, on July 12, 2026; the lowest is −27°F, on January 30, 2023.
The wettest calendar year on that record is 2014, with 16.87 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00094194; records: ACIS (NOAA Regional Climate Centers), station USW00094194. Records use complete months only; a month missing more than three days is left out.
How sunny is Rexburg?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Rexburg, 4.4 kWh per square metre a day. July is the sunniest month (89%) and December the cloudiest (58%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 64% | 1.8 |
| February | 66% | 2.7 |
| March | 69% | 4.0 |
| April | 70% | 5.2 |
| May | 74% | 6.3 |
| June | 82% | 7.3 |
| July | 89% | 7.6 |
| August | 87% | 6.5 |
| September | 83% | 5.0 |
| October | 74% | 3.2 |
| November | 66% | 1.9 |
| December | 58% | 1.4 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Rexburg need?
A normal year in Rexburg brings 7,893 heating degree days, 47% more than the median U.S. place (5,373), and 258 cooling degree days, 72% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,847 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,384 | 0 |
| February | 1,145 | 0 |
| March | 929 | 0 |
| April | 635 | 0 |
| May | 380 | 3 |
| June | 166 | 23 |
| July | 23 | 122 |
| August | 38 | 98 |
| September | 241 | 11 |
| October | 628 | 0 |
| November | 987 | 0 |
| December | 1,339 | 0 |
| Year (annual) | 7,893 | 258 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094194. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Rexburg been warmer than normal lately?
2025 averaged 46.9°F, 2.9°F above the 1991-2020 normal of 44.0°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 46.0°F | +2.0°F | 12.43 |
| 2022 | 44.1°F | +0.1°F | 8.62 |
| 2023 | 44.4°F | +0.4°F | 14.75 |
| 2024 | 46.0°F | +2.0°F | 10.20 |
| 2025 | 46.9°F | +2.9°F | 11.94 |
Source: observed years: ACIS, station USW00094194. A year counts only with all twelve months complete.
How does Rexburg's climate compare?
Rexburg is warmer than 23 of the other 84 places with their own NOAA record in Idaho, and wetter than 30. Across the 7,247 U.S. stations with normals, its annual mean of 44.0°F is warmer than 15%.
In the Köppen classification computed from these normals, Rexburg is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
What do Rexburg's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Rexburg. This page uses Rexburg Madison County Airport; the other differs by site and elevation, and the linked ones have pages of their own:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Rexburg BYU Idaho USC00107644 | 1 mi S | 5,005 ft | 44.8°F | 14°F | 85°F | 12.6 | – | May 12 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Rexburg's climate
What is the coldest month in Rexburg?
January, with a normal high of 28°F and a normal low of 13°F. The warmest is July (85°F by day, 52°F at night).
Does it snow in Rexburg?
Yes. NOAA publishes no 1991-2020 snowfall normal for Rexburg's NOAA station; the nearest record that keeps one, Ashton (24 miles away), records 70 inches of snow in a normal year.
What is the rainiest month in Rexburg?
May, with 1.71 in of precipitation in a normal year; the driest is July with 0.38 in.
What plant hardiness zone is Rexburg in?
The USDA's 2023 map puts Rexburg in zone 5a in ZIP code 83460. By the same method at Rexburg's NOAA station, the coldest night of a typical year reaches −14°F (22 years, 1991-2020): zone 5b.
How late can frost come in Rexburg?
In half of years the last 32°F night comes after May 15; in one year in ten it comes after June 3. Waiting until June 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Rexburg in OctoberThis month day by day, its records and recent years
- Idaho climateThe statewide normals and every place in the state
- Rexburg BYU Idaho, ID2 miles from this station, 44.8°F a year
- Sugar City, ID5 miles from this station, 42.7°F a year
- St. Anthony, ID11 miles from this station, 43.1°F a year
- Rigby, ID12 miles from this station, 45.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made