Hagerman, Idaho climate: Normal weather by month, frost dates and records
Hagerman's normal year runs from 22°F December nights to 92°F July afternoons, with 9.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.3°C, December lows of −5°C, July highs of 33°C, 249 mm of precipitation a year.
- NOAA stationHagerman (2 mi SW)
- Station IDUSC00103932
- Location42.81°N 114.92°W
- Elevation2,897 ft (883 m)
- Population991
On October 23, the normal high in Hagerman is 62°F and the normal low 33°F, and the chance of measurable rain or snow is 16%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Hagerman.
- Jan 38° 22°
- Feb 45° 25°
- Mar 55° 31°
- Apr 62° 35°
- May 72° 44°
- Jun 82° 50°
- Jul 92° 56°
- Aug 91° 53°
- Sep 81° 44°
- Oct 66° 35°
- Nov 50° 27°
- Dec 38° 22°
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 Hagerman each month?
July is the warmest month, with normal highs of 92°F; December the coldest, with normal lows of 22°F. The most precipitation falls in December (1.58 in), the least in July (0.15 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 38°F | 22°F | 30.2°F | 1.32 | 8 | <1 | 28 | 9 h 20 min |
| February | 45°F | 25°F | 34.7°F | 0.86 | 7 | <1 | 24 | 10 h 30 min |
| March | 55°F | 31°F | 43.0°F | 1.03 | 7 | <1 | 19 | 11 h 50 min |
| April | 62°F | 35°F | 48.9°F | 0.83 | 7 | <1 | 9 | 13 h 20 min |
| May | 72°F | 44°F | 57.9°F | 1.03 | 7 | 3 | 1 | 14 h 40 min |
| June | 82°F | 50°F | 65.9°F | 0.57 | 4 | 10 | <1 | 15 h 20 min |
| July | 92°F | 56°F | 73.9°F | 0.15 | 2 | 25 | <1 | 15 h |
| August | 91°F | 53°F | 71.7°F | 0.18 | 2 | 23 | <1 | 14 h |
| September | 81°F | 44°F | 62.5°F | 0.42 | 3 | 8 | 1 | 12 h 30 min |
| October | 66°F | 35°F | 50.4°F | 0.73 | 4 | 1 | 11 | 11 h 10 min |
| November | 50°F | 27°F | 38.4°F | 1.11 | 7 | <1 | 22 | 9 h 50 min |
| December | 38°F | 22°F | 30.1°F | 1.58 | 9 | <1 | 27 | 9 h |
| Year (annual) | 64°F | 37°F | 50.6°F | 9.81 | 67 | 69 | 142 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 3°C | −5°C | −1.0°C | 34 mm |
| February | 7°C | −4°C | 1.5°C | 22 mm |
| March | 13°C | −1°C | 6.1°C | 26 mm |
| April | 17°C | 2°C | 9.4°C | 21 mm |
| May | 22°C | 6°C | 14.4°C | 26 mm |
| June | 28°C | 10°C | 18.8°C | 14 mm |
| July | 33°C | 13°C | 23.3°C | 4 mm |
| August | 33°C | 12°C | 22.1°C | 5 mm |
| September | 27°C | 7°C | 16.9°C | 11 mm |
| October | 19°C | 2°C | 10.2°C | 19 mm |
| November | 10°C | −3°C | 3.6°C | 28 mm |
| December | 3°C | −5°C | −1.1°C | 40 mm |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00103932; 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 Hagerman?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, September has the fewest days with rain (3).
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 USC00103932.
When is the last frost in Hagerman?
In Hagerman, the last spring frost (32°F) comes after May 3 in half of years and after May 17 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 16 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 31 year in 10 after May 17; 9 in 10 after April 19
- First autumn frost, half of years before
- October 11 year in 10 before September 16; 9 in 10 before October 16
NOAA puts the median frost-free season at 151 days, and the season without a hard freeze (28°F) at 177 days.
A hard freeze (28°F) comes after April 19 in half of springs and before October 15 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hagerman in zone 7a in ZIP code 83332, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Hagerman's NOAA station is in zone 6b: the coldest night of a typical year reaches −1°F (20 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 USC00103932; 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 Hagerman?
In a normal year in Hagerman, 69 days a year reach 90°F (15 of them 100°F or more), 142 nights fall to 32°F or colder and 67 days bring measurable precipitation.
- Days at 90°F or more
- 69a normal year
- Days at 100°F or more
- 15a normal year
- Nights at 32°F or colder
- 142a normal year
- Days that stay below freezing
- 13high of 32°F or less
- Days with 0.01 inch of precipitation
- 67a normal year
The highest temperature in this station's record (since 1982) is 112°F, on July 18, 1998; the lowest is −25°F, on December 22, 1990.
The wettest calendar year on that record is 2010, with 13.31 in; the snowiest season is 2005–06, with 23.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00103932; records: ACIS (NOAA Regional Climate Centers), station USC00103932. Records use complete months only; a month missing more than three days is left out.
How sunny is Hagerman?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hagerman, 4.6 kWh per square metre a day. July is the sunniest month (90%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 1.9 |
| February | 69% | 2.8 |
| March | 72% | 4.0 |
| April | 76% | 5.5 |
| May | 80% | 6.7 |
| June | 86% | 7.6 |
| July | 90% | 7.6 |
| August | 89% | 6.6 |
| September | 87% | 5.3 |
| October | 82% | 3.6 |
| November | 73% | 2.2 |
| December | 62% | 1.5 |
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 Hagerman need?
A normal year in Hagerman brings 5,883 heating degree days, 9% more than the median U.S. place (5,373), and 671 cooling degree days, 26% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,709 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,080 | 0 |
| February | 848 | 0 |
| March | 682 | 0 |
| April | 484 | 1 |
| May | 239 | 19 |
| June | 74 | 99 |
| July | 6 | 282 |
| August | 12 | 220 |
| September | 125 | 48 |
| October | 454 | 1 |
| November | 797 | 0 |
| December | 1,082 | 0 |
| Year (annual) | 5,883 | 671 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00103932. 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.
How does Hagerman's climate compare?
Hagerman is warmer than 70 of the other 84 places with their own NOAA record in Idaho, and wetter than 9. Across the 7,247 U.S. stations with normals, its annual mean of 50.6°F is warmer than 43%.
In the Köppen classification computed from these normals, Hagerman is BSk: cold semi-arid steppe. 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 Hagerman share this climate record?
3 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.
- Gooding, ID3,825 people · 14 mi NE
- Wendell, ID3,032 people · 11 mi E
- Bliss, ID265 people · 8 mi N
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 Hagerman's climate
What is the coldest month in Hagerman?
December, with a normal high of 38°F and a normal low of 22°F. The warmest is July (92°F by day, 56°F at night).
What is the rainiest month in Hagerman?
December, with 1.58 in of precipitation in a normal year; the driest is July with 0.15 in.
What plant hardiness zone is Hagerman in?
The USDA's 2023 map puts Hagerman in zone 7a in ZIP code 83332, the nearest ZIP area. By the same method at Hagerman's NOAA station, the coldest night of a typical year reaches −1°F (20 years, 1991-2020): zone 6b.
How late can frost come in Hagerman?
In half of years the last 32°F night comes after May 3; in one year in ten it comes after May 17. Waiting until May 17 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Buhl, ID17 miles from this station, 50.2°F a year
- Castleford, ID18 miles from this station, 48.1°F a year
- Glenns Ferry, ID22 miles from this station, 54.6°F a year
- Jerome, ID24 miles from this station, 50.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made