Nezperce, Idaho climate: Normal weather by month, frost dates and records
Nezperce's normal year runs from 21°F December nights to 81°F August afternoons, with 20.0 inches of precipitation and 29 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.2°C, December lows of −6°C, August highs of 27°C, 507 mm of precipitation a year.
- NOAA stationNezperce
- Station IDUSC00106424
- Location46.23°N 116.24°W
- Elevation3,248 ft (990 m)
- Population475
On October 23, the normal high in Nezperce is 53°F and the normal low 32°F, and the chance of measurable rain or snow is 32%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Nezperce.
- Jan 35° 22°
- Feb 40° 24°
- Mar 47° 28°
- Apr 54° 33°
- May 62° 39°
- Jun 68° 44°
- Jul 80° 48°
- Aug 81° 48°
- Sep 71° 42°
- Oct 57° 34°
- Nov 42° 27°
- Dec 34° 21°
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 Nezperce each month?
August is the warmest month, with normal highs of 81°F; December the coldest, with normal lows of 21°F. The most precipitation falls in May (2.70 in), the least in August (0.78 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 35°F | 22°F | 28.6°F | 1.77 | 7.4 | 10 | <1 | 28 | 9 h |
| February | 40°F | 24°F | 31.8°F | 1.43 | 5.6 | 9 | <1 | 24 | 10 h 20 min |
| March | 47°F | 28°F | 37.2°F | 2.02 | 3.6 | 12 | <1 | 24 | 11 h 50 min |
| April | 54°F | 33°F | 43.1°F | 2.38 | 1.0 | 12 | <1 | 15 | 13 h 30 min |
| May | 62°F | 39°F | 50.6°F | 2.70 | 0.0 | 11 | <1 | 5 | 15 h |
| June | 68°F | 44°F | 56.0°F | 2.21 | 0.0 | 9 | 1 | 1 | 15 h 50 min |
| July | 80°F | 48°F | 63.8°F | 0.87 | 0.0 | 4 | 5 | <1 | 15 h 30 min |
| August | 81°F | 48°F | 64.2°F | 0.78 | 0.0 | 5 | 5 | <1 | 14 h 10 min |
| September | 71°F | 42°F | 56.4°F | 0.95 | 0.0 | 5 | 1 | 3 | 12 h 40 min |
| October | 57°F | 34°F | 45.0°F | 1.53 | 0.1 | 9 | <1 | 13 | 11 h |
| November | 42°F | 27°F | 34.8°F | 1.77 | 2.8 | 11 | <1 | 22 | 9 h 30 min |
| December | 34°F | 21°F | 27.6°F | 1.55 | 8.4 | 10 | <1 | 28 | 8 h 40 min |
| Year (annual) | 56°F | 34°F | 44.9°F | 19.96 | 28.9 | 107 | 11 | 163 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 2°C | −6°C | −1.9°C | 45 mm | 19 cm |
| February | 4°C | −5°C | −0.1°C | 36 mm | 14 cm |
| March | 8°C | −2°C | 2.9°C | 51 mm | 9 cm |
| April | 12°C | 0°C | 6.2°C | 60 mm | 3 cm |
| May | 17°C | 4°C | 10.3°C | 69 mm | 0 cm |
| June | 20°C | 7°C | 13.3°C | 56 mm | 0 cm |
| July | 27°C | 9°C | 17.7°C | 22 mm | 0 cm |
| August | 27°C | 9°C | 17.9°C | 20 mm | 0 cm |
| September | 22°C | 5°C | 13.6°C | 24 mm | 0 cm |
| October | 14°C | 1°C | 7.2°C | 39 mm | 0 cm |
| November | 6°C | −3°C | 1.6°C | 45 mm | 7 cm |
| December | 1°C | −6°C | −2.4°C | 39 mm | 21 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00106424; 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 Nezperce?
Normal highs sit between 65°F and 85°F in 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 USC00106424.
When is the last frost in Nezperce?
In Nezperce, the last spring frost (32°F) comes after May 24 in half of years and after June 19 in one year in ten; the first autumn frost comes before September 20 in half of years and before September 1 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 241 year in 10 after June 19; 9 in 10 after May 6
- First autumn frost, half of years before
- September 201 year in 10 before September 1; 9 in 10 before October 5
NOAA puts the median frost-free season at 116 days, and the season without a hard freeze (28°F) at 149 days.
A hard freeze (28°F) comes after May 5 in half of springs and before October 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Nezperce in zone 6b in ZIP code 83543, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Nezperce's NOAA station is in zone 6b: the coldest night of a typical year reaches −4°F (20 complete years).
Frost dates for every NOAA station in Idaho · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00106424; 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 Nezperce?
In a normal year in Nezperce, 11 days a year reach 90°F, 163 nights fall to 32°F or colder and 107 days bring measurable precipitation.
- Days at 90°F or more
- 11a 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
- 27high of 32°F or less
- Days with 0.01 inch of precipitation
- 107a normal year
- Days with 1 inch of snow or more
- 11a normal year
The highest temperature in this station's record (since 1901) is 106°F, on August 17, 2008; the lowest is −33°F, on December 30, 1968.
The wettest calendar year on that record is 1968, with 27.60 in; the snowiest season is 1971–72, with 104.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00106424; records: ACIS (NOAA Regional Climate Centers), station USC00106424. Records use complete months only; a month missing more than three days is left out.
How sunny is Nezperce?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Nezperce, 4.0 kWh per square metre a day. July is the sunniest month (91%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 59% | 1.3 |
| February | 64% | 2.2 |
| March | 64% | 3.3 |
| April | 70% | 4.8 |
| May | 75% | 6.0 |
| June | 78% | 6.8 |
| July | 91% | 7.5 |
| August | 88% | 6.2 |
| September | 83% | 4.5 |
| October | 73% | 2.8 |
| November | 61% | 1.5 |
| December | 55% | 1.0 |
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 Nezperce need?
A normal year in Nezperce brings 7,448 heating degree days, 39% more than the median U.S. place (5,373), and 148 cooling degree days, 84% 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 1,443 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,128 | 0 |
| February | 931 | 0 |
| March | 860 | 0 |
| April | 657 | 0 |
| May | 448 | 1 |
| June | 277 | 9 |
| July | 97 | 60 |
| August | 91 | 64 |
| September | 271 | 13 |
| October | 620 | 0 |
| November | 906 | 0 |
| December | 1,161 | 0 |
| Year (annual) | 7,448 | 148 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00106424. 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 Nezperce been warmer than normal lately?
Over 56 complete years from 1953 to 2019, the station's annual mean temperature rose at a fitted 0.8°F per century (+0.05°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Nezperce's climate compare?
Nezperce is warmer than 29 of the other 84 places with their own NOAA record in Idaho, and wetter than 54. Across the 7,247 U.S. stations with normals, its annual mean of 44.9°F is warmer than 19%.
In the Köppen classification computed from these normals, Nezperce 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 Nezperce's climate
What is the coldest month in Nezperce?
December, with a normal high of 34°F and a normal low of 21°F. The warmest is August (81°F by day, 48°F at night).
Does it snow in Nezperce?
Yes: 29 inches in a normal year, falling on 21 days with 0.1 inch or more, the most in December (8.4 inches).
What is the rainiest month in Nezperce?
May, with 2.70 in of precipitation in a normal year; the driest is August with 0.78 in.
What plant hardiness zone is Nezperce in?
The USDA's 2023 map puts Nezperce in zone 6b in ZIP code 83543, the nearest ZIP area. By the same method at Nezperce's NOAA station, the coldest night of a typical year reaches −4°F (20 years, 1991-2020): zone 6b.
How late can frost come in Nezperce?
In half of years the last 32°F night comes after May 24; in one year in ten it comes after June 19. Waiting until June 19 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Kamiah, ID10 miles from this station, 50.9°F a year
- Cottonwood, ID16 miles from this station, 47.6°F a year
- Winchester, ID18 miles from this station, 44.6°F a year
- Kooskia, ID19 miles from this station, 49.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made