Rexburg BYU Idaho, Idaho climate: Climate normals at a NOAA weather station
Rexburg BYU Idaho's normal year runs from 14°F January nights to 85°F July afternoons, with 12.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.1°C, January lows of −10°C, July highs of 29°C, 321 mm of precipitation a year.
- NOAA stationRexburg BYU Idaho
- Station IDUSC00107644
- Location43.81°N 111.79°W
- Elevation5,005 ft (1,526 m)
On October 22, the normal high in Rexburg BYU Idaho is 55°F and the normal low 31°F, and the chance of measurable rain or snow is 24%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Rexburg BYU Idaho.
- Jan 30° 14°
- Feb 34° 17°
- Mar 46° 26°
- Apr 56° 33°
- May 66° 41°
- Jun 75° 47°
- Jul 85° 52°
- Aug 84° 50°
- Sep 74° 43°
- Oct 58° 33°
- Nov 42° 24°
- Dec 30° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Rexburg BYU Idaho each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 14°F. The most precipitation falls in May (1.81 in), the least in July (0.59 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 30°F | 14°F | 21.8°F | 1.22 | 11 | <1 | 31 | 9 h 20 min |
| February | 34°F | 17°F | 25.5°F | 0.78 | 8 | <1 | 27 | 10 h 30 min |
| March | 46°F | 26°F | 35.9°F | 0.92 | 8 | <1 | 26 | 11 h 50 min |
| April | 56°F | 33°F | 44.6°F | 1.16 | 9 | <1 | 17 | 13 h 20 min |
| May | 66°F | 41°F | 53.5°F | 1.81 | 11 | <1 | 5 | 14 h 40 min |
| June | 75°F | 47°F | 61.0°F | 1.49 | 8 | 1 | 1 | 15 h 30 min |
| July | 85°F | 52°F | 68.5°F | 0.59 | 5 | 7 | <1 | 15 h 10 min |
| August | 84°F | 50°F | 67.1°F | 0.70 | 6 | 7 | <1 | 14 h |
| September | 74°F | 43°F | 58.3°F | 1.04 | 6 | 1 | 3 | 12 h 30 min |
| October | 58°F | 33°F | 45.7°F | 1.13 | 8 | <1 | 17 | 11 h 10 min |
| November | 42°F | 24°F | 32.9°F | 0.71 | 7 | <1 | 26 | 9 h 40 min |
| December | 30°F | 15°F | 22.6°F | 1.08 | 11 | <1 | 30 | 9 h |
| Year (annual) | 57°F | 33°F | 44.8°F | 12.63 | 97 | 16 | 184 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −1°C | −10°C | −5.7°C | 31 mm |
| February | 1°C | −8°C | −3.6°C | 20 mm |
| March | 8°C | −3°C | 2.2°C | 23 mm |
| April | 13°C | 1°C | 7.0°C | 29 mm |
| May | 19°C | 5°C | 11.9°C | 46 mm |
| June | 24°C | 8°C | 16.1°C | 38 mm |
| July | 29°C | 11°C | 20.3°C | 15 mm |
| August | 29°C | 10°C | 19.5°C | 18 mm |
| September | 23°C | 6°C | 14.6°C | 26 mm |
| October | 15°C | 1°C | 7.6°C | 29 mm |
| November | 6°C | −5°C | 0.5°C | 18 mm |
| December | −1°C | −9°C | −5.2°C | 27 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Ashton (25 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 USC00107644; 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.
Which months are mildest at Rexburg BYU Idaho?
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 (5).
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 USC00107644.
When is the last frost at Rexburg BYU Idaho?
In Rexburg BYU Idaho, the last spring frost (32°F) comes after May 12 in half of years and after June 2 in one year in ten; the first autumn frost comes before September 24 in half of years and before September 6 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 121 year in 10 after June 2; 9 in 10 after April 29
- First autumn frost, half of years before
- September 241 year in 10 before September 6; 9 in 10 before October 8
NOAA puts the median frost-free season at 132 days, and the season without a hard freeze (28°F) at 161 days.
A hard freeze (28°F) comes after April 30 in half of springs and before October 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Rexburg BYU Idaho in zone 5a in ZIP code 83460, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 5b: the coldest night of a typical year reaches −14°F (16 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 USC00107644; 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 at Rexburg BYU Idaho?
In a normal year in Rexburg BYU Idaho, 16 days a year reach 90°F, 184 nights fall to 32°F or colder and 97 days bring measurable precipitation.
- Days at 90°F or more
- 16a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 184a normal year
- Days that stay below freezing
- 59high of 32°F or less
- Days with 0.01 inch of precipitation
- 97a normal year
The highest temperature in this station's record (since 1977) is 102°F, on June 26, 1988; the lowest is −36°F, on February 1, 1985.
The wettest calendar year on that record is 1983, with 20.72 in; the snowiest season is 1984–85, with 95.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00107644; records: ACIS (NOAA Regional Climate Centers), station USC00107644. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Rexburg BYU Idaho?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds at Rexburg BYU Idaho, 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 many heating and cooling degree days does Rexburg BYU Idaho record?
A normal year at Rexburg BYU Idaho brings 7,636 heating degree days, 42% more than the median U.S. place (5,373), and 299 cooling degree days, 67% 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 1,948 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,338 | 0 |
| February | 1,106 | 0 |
| March | 902 | 0 |
| April | 614 | 0 |
| May | 360 | 4 |
| June | 152 | 33 |
| July | 28 | 136 |
| August | 41 | 108 |
| September | 219 | 18 |
| October | 600 | 0 |
| November | 963 | 0 |
| December | 1,314 | 0 |
| Year (annual) | 7,636 | 299 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00107644. 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.
Have recent years at Rexburg BYU Idaho been warmer than normal?
2022 averaged 44.1°F, 0.7°F below the 1991-2020 normal of 44.8°F. 1 of the 2 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 46.6°F | +1.8°F | – |
| 2022 | 44.1°F | −0.7°F | 7.27 |
Source: observed years: ACIS, station USC00107644. A year counts only with all twelve months complete.
How does Rexburg BYU Idaho's climate compare?
Rexburg BYU Idaho is warmer than 29 of the 85 places with their own NOAA record in Idaho, and wetter than 34. Across the 7,247 U.S. stations with normals, its annual mean of 44.8°F is warmer than 18%.
In the Köppen classification computed from these normals, Rexburg BYU Idaho 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.
Questions about Rexburg BYU Idaho's climate
What is the coldest month at Rexburg BYU Idaho?
January, with a normal high of 30°F and a normal low of 14°F. The warmest is July (85°F by day, 52°F at night).
Does it snow at Rexburg BYU Idaho?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Ashton (25 miles away), records 70 inches of snow in a normal year.
What is the rainiest month at Rexburg BYU Idaho?
May, with 1.81 in of precipitation in a normal year; the driest is July with 0.59 in.
What plant hardiness zone is Rexburg BYU Idaho in?
The USDA's 2023 map puts Rexburg BYU Idaho in zone 5a in ZIP code 83460, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −14°F (16 years, 1991-2020): zone 5b.
How late can frost come at Rexburg BYU Idaho?
In half of years the last 32°F night comes after May 12; in one year in ten it comes after June 2. Waiting until June 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Rexburg, ID2 miles from this station, 44.0°F a year
- Sugar City, ID6 miles from this station, 42.7°F a year
- Rigby, ID11 miles from this station, 45.9°F a year
- St. Anthony, ID11 miles from this station, 43.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made