Plummer, Idaho climate: Normal weather by month, frost dates and records
Plummer's normal year runs from 23°F December nights to 83°F August afternoons, with 28.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.1°C, December lows of −5°C, August highs of 28°C, 724 mm of precipitation a year.
- NOAA stationPlummer (3 mi WSW)
- Station IDUSC00107188
- Location47.31°N 116.95°W
- Elevation2,905 ft (885 m)
- Population1,125
On October 22, the normal high in Plummer is 54°F and the normal low 34°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Plummer.
- Jan 37° 24°
- Feb 40° 25°
- Mar 47° 29°
- Apr 55° 34°
- May 65° 41°
- Jun 70° 45°
- Jul 81° 52°
- Aug 83° 51°
- Sep 73° 44°
- Oct 57° 36°
- Nov 43° 30°
- Dec 35° 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 Plummer each month?
August is the warmest month, with normal highs of 83°F; December the coldest, with normal lows of 23°F. The most precipitation falls in January (3.79 in), the least in July (0.71 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 37°F | 24°F | 30.2°F | 3.79 | – | <1 | 28 | 8 h 50 min |
| February | 40°F | 25°F | 32.3°F | 2.57 | – | <1 | 25 | 10 h 10 min |
| March | 47°F | 29°F | 38.0°F | 3.59 | – | <1 | 23 | 11 h 50 min |
| April | 55°F | 34°F | 44.5°F | 2.34 | – | <1 | 15 | 13 h 30 min |
| May | 65°F | 41°F | 52.6°F | 2.46 | – | <1 | 5 | 15 h |
| June | 70°F | 45°F | 57.1°F | 1.90 | – | <1 | <1 | 15 h 50 min |
| July | 81°F | 52°F | 66.5°F | 0.71 | – | 7 | <1 | 15 h 40 min |
| August | 83°F | 51°F | 66.7°F | 0.74 | – | 7 | <1 | 14 h 20 min |
| September | 73°F | 44°F | 58.4°F | 1.02 | – | 1 | 1 | 12 h 40 min |
| October | 57°F | 36°F | 46.5°F | 2.50 | – | <1 | 13 | 11 h |
| November | 43°F | 30°F | 36.3°F | 3.55 | – | <1 | 21 | 9 h 20 min |
| December | 35°F | 23°F | 28.7°F | 3.35 | – | <1 | 28 | 8 h 30 min |
| Year (annual) | 57°F | 36°F | 46.5°F | 28.52 | – | 15 | 158 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 3°C | −5°C | −1.0°C | 96 mm |
| February | 4°C | −4°C | 0.2°C | 65 mm |
| March | 8°C | −1°C | 3.3°C | 91 mm |
| April | 13°C | 1°C | 6.9°C | 59 mm |
| May | 18°C | 5°C | 11.4°C | 62 mm |
| June | 21°C | 7°C | 13.9°C | 48 mm |
| July | 27°C | 11°C | 19.2°C | 18 mm |
| August | 28°C | 10°C | 19.3°C | 19 mm |
| September | 23°C | 7°C | 14.7°C | 26 mm |
| October | 14°C | 2°C | 8.1°C | 64 mm |
| November | 6°C | −1°C | 2.4°C | 90 mm |
| December | 1°C | −5°C | −1.8°C | 85 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, St. Maries (18 miles away), gets 56 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00107188; 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 Plummer?
Normal highs sit between 65°F and 85°F in 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 USC00107188.
When is the last frost in Plummer?
In Plummer, the last spring frost (32°F) comes after May 11 in half of years and after June 4 in one year in ten; the first autumn frost comes before October 5 in half of years and before September 15 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 111 year in 10 after June 4; 9 in 10 after April 25
- First autumn frost, half of years before
- October 51 year in 10 before September 15; 9 in 10 before October 21
NOAA puts the median frost-free season at 143 days, and the season without a hard freeze (28°F) at 181 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 19 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Plummer in zone 6b in ZIP code 83851, 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 USC00107188; 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 Plummer?
In a normal year in Plummer, 15 days a year reach 90°F (1 of them 100°F or more) and 158 nights fall to 32°F or colder.
- Days at 90°F or more
- 15a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 158a normal year
- Days that stay below freezing
- 30high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00107188.
How sunny is Plummer?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Plummer, 3.8 kWh per square metre a day. July is the sunniest month (90%) and December the cloudiest (50%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 53% | 1.1 |
| February | 62% | 2.0 |
| March | 61% | 3.1 |
| April | 67% | 4.6 |
| May | 74% | 5.9 |
| June | 75% | 6.5 |
| July | 90% | 7.4 |
| August | 88% | 6.1 |
| September | 81% | 4.4 |
| October | 71% | 2.6 |
| November | 56% | 1.3 |
| December | 50% | 0.9 |
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 Plummer need?
A normal year in Plummer brings 7,000 heating degree days, 30% more than the median U.S. place (5,373), and 278 cooling degree days, 69% 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 1,748 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,079 | 0 |
| February | 917 | 0 |
| March | 837 | 0 |
| April | 613 | 0 |
| May | 388 | 3 |
| June | 250 | 15 |
| July | 69 | 117 |
| August | 63 | 117 |
| September | 224 | 26 |
| October | 574 | 1 |
| November | 861 | 0 |
| December | 1,125 | 0 |
| Year (annual) | 7,000 | 278 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00107188. 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 Plummer's climate compare?
Plummer is warmer than 42 of the other 84 places with their own NOAA record in Idaho, and wetter than 71. Across the 7,247 U.S. stations with normals, its annual mean of 46.5°F is warmer than 25%.
In the Köppen classification computed from these normals, Plummer is Dsb: continental, dry-summer, 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 Plummer share this climate record?
11 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.
- Tekoa, WA809 people · 8 mi SW
- Rockford, WA627 people · 13 mi NW
- Fairfield, WA598 people · 11 mi NW
- Spangle, WA278 people · 22 mi W
- Worley, ID250 people · 6 mi N
- Harrison, ID223 people · 13 mi NE
- Latah, WA177 people · 10 mi W
- De Smet, ID134 people · 12 mi S
- Conkling Park, ID131 people · 11 mi NE
- Waverly, WA123 people · 13 mi W
- Tensed, ID96 people · 11 mi S
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 Plummer's climate
What is the coldest month in Plummer?
December, with a normal high of 35°F and a normal low of 23°F. The warmest is August (83°F by day, 51°F at night).
Does it snow in Plummer?
Yes. NOAA publishes no 1991-2020 snowfall normal for Plummer's NOAA station; the nearest record that keeps one, St. Maries (18 miles away), records 56 inches of snow in a normal year.
What is the rainiest month in Plummer?
January, with 3.79 in of precipitation in a normal year; the driest is July with 0.71 in.
What plant hardiness zone is Plummer in?
The USDA's 2023 map puts Plummer in zone 6b in ZIP code 83851, the nearest ZIP area.
How late can frost come in Plummer?
In half of years the last 32°F night comes after May 11; in one year in ten it comes after June 4. Waiting until June 4 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- St. Maries, ID17 miles from this station, 47.9°F a year
- Rosalia, WA20 miles from this station, 48.1°F a year
- Potlatch, ID25 miles from this station, 46.9°F a year
- Coeur d'Alene, ID27 miles from this station, 48.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made