Island Park, ID Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Island Park's primary NOAA station, ISLAND PARK.
The climate verdict for Island Park
Island Park, Idaho has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 37°F. July is the warmest month at 60°F and December the coldest at 16°F.
- 37°F
- average temperature, NOAA 1991-2020 normal
- 28.8"
- precipitation, annual total
Island Park: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00104598 · Island Park, ID 37°F mean · 28.8" precip
TEMP-COLD · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COLD 37°F
- RANK-COOL #137
- PHOTO-FINISH ≈ Matanuska
- PRCP-MID 28.8"
- SWING-MID 44°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 10,272 HDD
- STN-1 USC00104598
- BOOK-FULL 5/6 fields
Nearest mean-temperature peer: Matanuska Exp Farm, AK ( -0.1 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every ID station list.
- Island Park (this station) 37°F
- Cold Matanuska, AK 37°F
- Hot Tower Falls, WY 37°F
- Near Cooper Landing, AK 37°F
- Near Creede Wtp, CO 37°F
Climate Living Index · Island Park
Island Park: 18/100 · grade F
Island Park publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Island Park, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 28.8 in · 6.2 from 35 in | 78/100 · B |
| Annual temperature balance | 36.8°F · 30.7° from 67.5°F | 0/100 · F |
| Normal heat + freeze calendar | 244 calendar days | 0/100 · F |
Island Park · 2026-08-04 · NOAA NCEI Climate Normals · method .
Island Park is a continental Köppen climate: Dsb
Coldest-month mean 16.0°F and warmest-month mean 60.0°F place this station in continental, dry-summer, warm summer climates (Dsb). Class Dsb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, dry-summer, warm summer.
- Köppen code
- Dsb
- Group
- Continental
- Warmest month
- 60.0°F
- Coldest month
- 16.0°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Island Park sits across the climate record
Three NOAA fields for Island Park's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 98%
- Among 6,861 stations, Island Park sits in the cooler third of annual means.
- Annual precipitation
- 39th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- 53rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
Island Park's measured station temperature trend
MethodologyAcross 55 complete annual observations from 1938 to 2025, ISLAND PARK warmed at a fitted rate of 0.10°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Island Park primary station fitted change +0.10 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 27°F (-3°C) | 6°F (-14°C) | 16°F (-9°C) | 3.5" | 30.9 | 0.0 |
| February | 30°F (-1°C) | 8°F (-14°C) | 19°F (-7°C) | 2.6" | 28.0 | 0.0 |
| March | 39°F (4°C) | 15°F (-10°C) | 27°F (-3°C) | 2.0" | 30.3 | 0.0 |
| April | 47°F (9°C) | 23°F (-5°C) | 35°F (2°C) | 2.4" | 27.6 | 0.0 |
| May | 59°F (15°C) | 32°F (0°C) | 45°F (7°C) | 3.0" | 17.2 | 0.0 |
| June | 67°F (20°C) | 38°F (3°C) | 53°F (11°C) | 2.6" | 5.8 | 0.1 |
| July | 77°F (25°C) | 43°F (6°C) | 60°F (16°C) | 1.2" | 1.1 | 1.5 |
| August | 77°F (25°C) | 40°F (4°C) | 59°F (15°C) | 1.1" | 3.0 | 0.9 |
| September | 68°F (20°C) | 32°F (0°C) | 50°F (10°C) | 1.7" | 15.7 | 0.0 |
| October | 51°F (11°C) | 24°F (-4°C) | 38°F (3°C) | 2.1" | 27.1 | 0.0 |
| November | 36°F (2°C) | 14°F (-10°C) | 25°F (-4°C) | 2.5" | 29.4 | 0.0 |
| December | 26°F (-4°C) | 6°F (-14°C) | 16°F (-9°C) | 4.0" | 31.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 80°F around July 28, short of 90°F on every date, while 244 dates carry a normal low at or below freezing, the coldest 5°F near December 25.
The freezing stretch
The normal low stays at or below 32°F into May 17, then returns to freezing around September 17, covering 244 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
The widest day
August 26 carries the biggest normal gap between afternoon and dawn, 38°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Island Park.
Where Island Park Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 244 nights a year, placing this among the most frost-prone tenth of ranked stations.
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 38°F, sharper than nine in ten ranked stations see.
Island Park earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
Island Park's wet season runs through the cold months
December, January and February carry 35% of the year's precipitation here, while June through August contribute 17%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows a 44°F seasonal spread.
- Wettest month
- December, 4.0"
- Driest month
- August, 1.1"
- Wettest three months
- December, January, May (37% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
10,272
Higher = more heating needed
Cooling Degree Days
23
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside ID closest to Island Park on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (37°F here).
- Jackson, MT 37°F · 0.0°F off
- Valdez, AK 37°F · 0.0°F off
- Babbitt, MN 37°F · 0.1°F off
- Cooper Landing, AK 37°F · 0.1°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (28.8" here), excluding temperature-peer places.
- Andover, MN 28.8" · 0.0" off
- Concord, NE 28.8" · 0.0" off
- Isle, MN 28.8" · 0.0" off
- Escanaba, MI 28.8" · 0.0" off
Data-derived climate profile
How Island Park's climate pattern fits together
heating led · moderate · mid swing
Island Park's energy balance leans toward cold weather: 10,272 annual heating degree days against 23 for cooling. Its 44.0°F seasonal range still makes the monthly rows more useful than the annual average alone.
A frost-free growing-season length is not available for Island Park. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
July and December mark the typical warm and cold ends of the calendar in Island Park's middle-range seasonal profile. The measured spread is 44.0°F. The annual average is 37°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Island Park's 28.8 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Island Park's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Island Park, not an official NOAA class or a year-ahead forecast.
Questions about Island Park's climate
How much rain does Island Park get? ▼
How cold does Island Park get in winter? ▼
How much energy does heating and cooling require in Island Park? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Island Park's primary station: ISLAND PARK (USC00104598). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 1640600). Match rule for Island Park: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Island Park comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.