Rigby, Idaho climate: Normal weather by month, frost dates and records
Rigby's normal year runs from 15°F January nights to 85°F July afternoons, with 13.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.7°C, January lows of −9°C, July highs of 29°C, 342 mm of precipitation a year.
- NOAA stationRigby
- Station IDUSC00107689
- Location43.68°N 111.91°W
- Elevation4,856 ft (1,480 m)
- Population5,683
On October 22, the normal high in Rigby is 57°F and the normal low 33°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Rigby.
- Jan 31° 15°
- Feb 35° 18°
- Mar 48° 28°
- Apr 57° 33°
- May 67° 42°
- Jun 75° 48°
- Jul 85° 55°
- Aug 84° 54°
- Sep 75° 46°
- Oct 60° 35°
- Nov 43° 25°
- Dec 30° 16°
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 Rigby each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 15°F. The most precipitation falls in May (1.80 in), the least in July (0.56 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 31°F | 15°F | 22.8°F | 1.32 | – | <1 | 31 | 9 h 20 min |
| February | 35°F | 18°F | 26.6°F | 0.78 | – | <1 | 26 | 10 h 30 min |
| March | 48°F | 28°F | 37.7°F | 1.12 | – | <1 | 23 | 11 h 50 min |
| April | 57°F | 33°F | 45.0°F | 1.44 | – | <1 | 14 | 13 h 20 min |
| May | 67°F | 42°F | 54.1°F | 1.80 | – | <1 | 4 | 14 h 40 min |
| June | 75°F | 48°F | 61.6°F | 1.30 | – | 1 | <1 | 15 h 30 min |
| July | 85°F | 55°F | 69.5°F | 0.56 | – | 6 | <1 | 15 h 10 min |
| August | 84°F | 54°F | 68.9°F | 0.78 | – | 5 | <1 | 14 h |
| September | 75°F | 46°F | 60.5°F | 1.09 | – | <1 | 1 | 12 h 30 min |
| October | 60°F | 35°F | 47.2°F | 1.19 | – | <1 | 12 | 11 h 10 min |
| November | 43°F | 25°F | 34.2°F | 0.79 | – | <1 | 23 | 9 h 40 min |
| December | 30°F | 16°F | 22.8°F | 1.31 | – | <1 | 30 | 9 h |
| Year (annual) | 57°F | 34°F | 45.9°F | 13.48 | – | 13 | 163 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −1°C | −9°C | −5.1°C | 34 mm |
| February | 2°C | −8°C | −3.0°C | 20 mm |
| March | 9°C | −2°C | 3.2°C | 28 mm |
| April | 14°C | 1°C | 7.2°C | 37 mm |
| May | 19°C | 5°C | 12.3°C | 46 mm |
| June | 24°C | 9°C | 16.4°C | 33 mm |
| July | 29°C | 13°C | 20.8°C | 14 mm |
| August | 29°C | 12°C | 20.5°C | 20 mm |
| September | 24°C | 8°C | 15.8°C | 28 mm |
| October | 15°C | 2°C | 8.4°C | 30 mm |
| November | 6°C | −4°C | 1.2°C | 20 mm |
| December | −1°C | −9°C | −5.1°C | 33 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Idaho Falls (16 mi SE) (24 miles away), gets 66 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00107689; 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 Rigby?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
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 USC00107689.
When is the last frost in Rigby?
In Rigby, the last spring frost (32°F) comes after May 9 in half of years and after May 25 in one year in ten; the first autumn frost comes before October 5 in half of years and before September 21 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 91 year in 10 after May 25; 9 in 10 after April 27
- First autumn frost, half of years before
- October 51 year in 10 before September 21; 9 in 10 before October 18
NOAA puts the median frost-free season at 148 days, and the season without a hard freeze (28°F) at 170 days.
A hard freeze (28°F) comes after April 28 in half of springs and before October 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Rigby in zone 5b in ZIP code 83442, the nearest ZIP area.
Frost dates for every NOAA station in Idaho · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00107689; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Rigby?
In a normal year in Rigby, 13 days a year reach 90°F and 163 nights fall to 32°F or colder.
- Days at 90°F or more
- 13a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 163a normal year
- Days that stay below freezing
- 52high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00107689.
How sunny is Rigby?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Rigby, 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 Rigby need?
A normal year in Rigby brings 7,311 heating degree days, 36% more than the median U.S. place (5,373), and 383 cooling degree days, 58% 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 2,145 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,308 | 0 |
| February | 1,076 | 0 |
| March | 847 | 0 |
| April | 598 | 0 |
| May | 343 | 5 |
| June | 142 | 40 |
| July | 19 | 160 |
| August | 24 | 145 |
| September | 168 | 32 |
| October | 551 | 1 |
| November | 926 | 0 |
| December | 1,308 | 0 |
| Year (annual) | 7,311 | 383 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00107689. 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 Rigby been warmer than normal lately?
2024 averaged 48.5°F, 2.6°F above the 1991-2020 normal of 45.9°F. 2 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 47.7°F | +1.8°F | 11.66 |
| 2022 | 45.1°F | −0.8°F | 9.89 |
| 2023 | 45.8°F | −0.1°F | 12.70 |
| 2024 | 48.5°F | +2.6°F | 10.89 |
Source: observed years: ACIS, station USC00107689. A year counts only with all twelve months complete.
How does Rigby's climate compare?
Rigby is warmer than 35 of the other 84 places with their own NOAA record in Idaho, and wetter than 38. Across the 7,247 U.S. stations with normals, its annual mean of 45.9°F is warmer than 23%.
In the Köppen classification computed from these normals, Rigby 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.
Which places near Rigby share this climate record?
4 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Menan, ID734 people · 5 mi NW
- Ririe, ID715 people · 8 mi SE
- Roberts, ID583 people · 11 mi W
- Lewisville, ID446 people · 5 mi W
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Rigby's climate
What is the coldest month in Rigby?
January, with a normal high of 31°F and a normal low of 15°F. The warmest is July (85°F by day, 55°F at night).
Does it snow in Rigby?
Yes. NOAA publishes no 1991-2020 snowfall normal for Rigby's NOAA station; the nearest record that keeps one, Idaho Falls (16 mi SE) (24 miles away), records 66 inches of snow in a normal year.
What is the rainiest month in Rigby?
May, with 1.80 in of precipitation in a normal year; the driest is July with 0.56 in.
What plant hardiness zone is Rigby in?
The USDA's 2023 map puts Rigby in zone 5b in ZIP code 83442, the nearest ZIP area.
How late can frost come in Rigby?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 25. Waiting until May 25 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 BYU Idaho, ID11 miles from this station, 44.8°F a year
- Rexburg, ID12 miles from this station, 44.0°F a year
- Idaho Falls - Kifi, ID12 miles from this station, 46.5°F a year
- Idaho Falls, ID14 miles from this station, 44.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made