Weiser, Idaho climate: Normal weather by month, frost dates and records
Weiser's normal year runs from 23°F January nights to 95°F July afternoons, with 13.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.3°C, January lows of −5°C, July highs of 35°C, 342 mm of precipitation a year.
- NOAA stationWeiser
- Station IDUSC00109638
- Location44.25°N 116.97°W
- Elevation2,120 ft (646 m)
- Population6,112
On October 22, the normal high in Weiser is 62°F and the normal low 35°F, and the chance of measurable rain or snow is 20%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Weiser.
- Jan 36° 23°
- Feb 44° 26°
- Mar 57° 33°
- Apr 64° 39°
- May 74° 47°
- Jun 84° 53°
- Jul 95° 61°
- Aug 92° 59°
- Sep 81° 49°
- Oct 65° 38°
- Nov 48° 29°
- Dec 37° 23°
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 Weiser each month?
July is the warmest month, with normal highs of 95°F; January the coldest, with normal lows of 23°F. The most precipitation falls in December (2.37 in), the least in August (0.26 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 36°F | 23°F | 29.4°F | 1.96 | 11 | <1 | 29 | 9 h 10 min |
| February | 44°F | 26°F | 35.3°F | 1.34 | 9 | <1 | 24 | 10 h 30 min |
| March | 57°F | 33°F | 44.8°F | 1.22 | 10 | <1 | 16 | 11 h 50 min |
| April | 64°F | 39°F | 51.4°F | 1.07 | 10 | <1 | 8 | 13 h 20 min |
| May | 74°F | 47°F | 60.6°F | 1.29 | 8 | 3 | 1 | 14 h 40 min |
| June | 84°F | 53°F | 68.5°F | 1.04 | 7 | 8 | <1 | 15 h 30 min |
| July | 95°F | 61°F | 77.8°F | 0.35 | 3 | 24 | <1 | 15 h 10 min |
| August | 92°F | 59°F | 75.4°F | 0.26 | 3 | 21 | <1 | 14 h |
| September | 81°F | 49°F | 64.9°F | 0.40 | 3 | 5 | 1 | 12 h 40 min |
| October | 65°F | 38°F | 51.3°F | 0.83 | 5 | <1 | 9 | 11 h |
| November | 48°F | 29°F | 38.2°F | 1.32 | 11 | <1 | 21 | 9 h 40 min |
| December | 37°F | 23°F | 29.7°F | 2.37 | 12 | <1 | 28 | 8 h 50 min |
| Year (annual) | 65°F | 40°F | 52.3°F | 13.45 | 90 | 59 | 136 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 2°C | −5°C | −1.4°C | 50 mm |
| February | 7°C | −3°C | 1.8°C | 34 mm |
| March | 14°C | 0°C | 7.1°C | 31 mm |
| April | 18°C | 4°C | 10.8°C | 27 mm |
| May | 24°C | 8°C | 15.9°C | 33 mm |
| June | 29°C | 12°C | 20.3°C | 26 mm |
| July | 35°C | 16°C | 25.4°C | 9 mm |
| August | 33°C | 15°C | 24.1°C | 7 mm |
| September | 27°C | 9°C | 18.3°C | 10 mm |
| October | 18°C | 3°C | 10.7°C | 21 mm |
| November | 9°C | −2°C | 3.4°C | 34 mm |
| December | 3°C | −5°C | −1.3°C | 60 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Malheur Branch Experiment Station (19 miles away), gets 15 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00109638; 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 Weiser?
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 USC00109638.
When is the last frost in Weiser?
In Weiser, the last spring frost (32°F) comes after April 23 in half of years and after May 10 in one year in ten; the first autumn frost comes before October 13 in half of years and before October 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
- April 231 year in 10 after May 10; 9 in 10 after April 3
- First autumn frost, half of years before
- October 131 year in 10 before October 1; 9 in 10 before October 27
NOAA puts the median frost-free season at 174 days, and the season without a hard freeze (28°F) at 204 days.
A hard freeze (28°F) comes after April 3 in half of springs and before October 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Weiser in zone 7a in ZIP code 83672, 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 USC00109638; 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 Weiser?
In a normal year in Weiser, 59 days a year reach 90°F (13 of them 100°F or more), 136 nights fall to 32°F or colder and 90 days bring measurable precipitation.
- Days at 90°F or more
- 59a normal year
- Days at 100°F or more
- 13a normal year
- Nights at 32°F or colder
- 136a normal year
- Days that stay below freezing
- 18high of 32°F or less
- Days with 0.01 inch of precipitation
- 90a normal year
The highest temperature in this station's record (since 1911) is 115°F, on July 2, 1924; the lowest is −29°F, on February 6, 1989.
The wettest calendar year on that record is 1942, with 16.61 in; the snowiest season is 2003–04, with 50.4 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00109638; records: ACIS (NOAA Regional Climate Centers), station USC00109638. Records use complete months only; a month missing more than three days is left out.
How sunny is Weiser?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Weiser, 4.4 kWh per square metre a day. July is the sunniest month (92%) and December the cloudiest (57%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 61% | 1.6 |
| February | 66% | 2.5 |
| March | 66% | 3.6 |
| April | 74% | 5.3 |
| May | 78% | 6.5 |
| June | 82% | 7.3 |
| July | 92% | 7.8 |
| August | 91% | 6.6 |
| September | 86% | 5.0 |
| October | 78% | 3.2 |
| November | 66% | 1.8 |
| December | 57% | 1.2 |
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 Weiser need?
A normal year in Weiser brings 5,616 heating degree days, 5% more than the median U.S. place (5,373), and 1,008 cooling degree days, 11% more 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 3,215 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,105 | 0 |
| February | 830 | 0 |
| March | 626 | 0 |
| April | 409 | 1 |
| May | 179 | 43 |
| June | 45 | 148 |
| July | 3 | 400 |
| August | 6 | 329 |
| September | 89 | 86 |
| October | 425 | 2 |
| November | 802 | 0 |
| December | 1,096 | 0 |
| Year (annual) | 5,616 | 1,008 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00109638. 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 Weiser's climate compare?
Weiser is warmer than 76 of the other 84 places with their own NOAA record in Idaho, and wetter than 37. Across the 7,247 U.S. stations with normals, its annual mean of 52.3°F is warmer than 51%.
In the Köppen classification computed from these normals, Weiser 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 Weiser share this climate record?
Annex has no NOAA station with 1991-2020 normals of its 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.
- Annex, OR304 people · 1 mi SW
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 Weiser's climate
What is the coldest month in Weiser?
January, with a normal high of 36°F and a normal low of 23°F. The warmest is July (95°F by day, 61°F at night).
Does it snow in Weiser?
Yes. NOAA publishes no 1991-2020 snowfall normal for Weiser's NOAA station; the nearest record that keeps one, Malheur Branch Experiment Station (19 miles away), records 15 inches of snow in a normal year.
What is the rainiest month in Weiser?
December, with 2.37 in of precipitation in a normal year; the driest is August with 0.26 in.
What plant hardiness zone is Weiser in?
The USDA's 2023 map puts Weiser in zone 7a in ZIP code 83672, the nearest ZIP area.
How late can frost come in Weiser?
In half of years the last 32°F night comes after April 23; in one year in ten it comes after May 10. Waiting until May 10 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Payette, ID12 miles from this station, 53.2°F a year
- Ontario, OR16 miles from this station, 53.7°F a year
- Huntington, OR16 miles from this station, 52.5°F a year
- Malheur Branch Experiment Station, OR19 miles from this station, 52.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made