Bellevue, Idaho climate: Normal weather by month, frost dates and records
Bellevue's normal year runs from 16°F January nights to 88°F July afternoons, with 17.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.3°C, January lows of −9°C, July highs of 31°C, 445 mm of precipitation a year.
- NOAA stationBellevue
- Station IDUSC00100774
- Location43.47°N 114.26°W
- Elevation5,192 ft (1,583 m)
- Population2,582
On October 23, the normal high in Bellevue is 57°F and the normal low 32°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Bellevue.
- Jan 35° 16°
- Feb 38° 19°
- Mar 48° 27°
- Apr 59° 35°
- May 67° 41°
- Jun 77° 47°
- Jul 88° 54°
- Aug 86° 53°
- Sep 76° 45°
- Oct 61° 35°
- Nov 45° 25°
- Dec 34° 17°
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 Bellevue each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 16°F. The most precipitation falls in December (2.44 in), the least in July (0.61 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 35°F | 16°F | 25.4°F | 2.06 | – | <1 | 30 | 9 h 20 min |
| February | 38°F | 19°F | 28.5°F | 1.50 | – | <1 | 25 | 10 h 30 min |
| March | 48°F | 27°F | 37.6°F | 1.41 | – | <1 | 22 | 11 h 50 min |
| April | 59°F | 35°F | 46.8°F | 1.11 | – | <1 | 9 | 13 h 20 min |
| May | 67°F | 41°F | 54.3°F | 2.07 | – | <1 | 2 | 14 h 40 min |
| June | 77°F | 47°F | 61.9°F | 1.29 | – | 2 | <1 | 15 h 20 min |
| July | 88°F | 54°F | 70.8°F | 0.61 | – | 12 | <1 | 15 h 10 min |
| August | 86°F | 53°F | 69.3°F | 0.71 | – | 8 | <1 | 14 h |
| September | 76°F | 45°F | 60.4°F | 0.84 | – | 2 | <1 | 12 h 30 min |
| October | 61°F | 35°F | 47.7°F | 1.75 | – | <1 | 12 | 11 h 10 min |
| November | 45°F | 25°F | 34.8°F | 1.73 | – | <1 | 23 | 9 h 40 min |
| December | 34°F | 17°F | 25.4°F | 2.44 | – | <1 | 30 | 9 h |
| Year (annual) | 59°F | 34°F | 46.9°F | 17.52 | – | 24 | 154 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 2°C | −9°C | −3.7°C | 52 mm |
| February | 3°C | −7°C | −1.9°C | 38 mm |
| March | 9°C | −3°C | 3.1°C | 36 mm |
| April | 15°C | 1°C | 8.2°C | 28 mm |
| May | 20°C | 5°C | 12.4°C | 53 mm |
| June | 25°C | 8°C | 16.6°C | 33 mm |
| July | 31°C | 12°C | 21.6°C | 15 mm |
| August | 30°C | 12°C | 20.7°C | 18 mm |
| September | 24°C | 7°C | 15.8°C | 21 mm |
| October | 16°C | 1°C | 8.7°C | 44 mm |
| November | 7°C | −4°C | 1.6°C | 44 mm |
| December | 1°C | −9°C | −3.7°C | 62 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Picabo (15 miles away), gets 46 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00100774; 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 Bellevue?
Normal highs sit between 65°F and 85°F in May, June 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 USC00100774.
When is the last frost in Bellevue?
In Bellevue, the last spring frost (32°F) comes after May 13 in half of years and after June 3 in one year in ten; the first autumn frost comes before October 2 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 131 year in 10 after June 3; 9 in 10 after April 30
- First autumn frost, half of years before
- October 21 year in 10 before September 15; 9 in 10 before October 17
NOAA puts the median frost-free season at 139 days, and the season without a hard freeze (28°F) at 169 days.
A hard freeze (28°F) comes after April 28 in half of springs and before October 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Bellevue in zone 6a in ZIP code 83333, 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 USC00100774; 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 Bellevue?
In a normal year in Bellevue, 24 days a year reach 90°F and 154 nights fall to 32°F or colder.
- Days at 90°F or more
- 24a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 154a normal year
- Days that stay below freezing
- 34high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00100774.
How sunny is Bellevue?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Bellevue, 4.6 kWh per square metre a day. July is the sunniest month (90%) and December the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 2.0 |
| February | 72% | 2.9 |
| March | 72% | 4.1 |
| April | 74% | 5.4 |
| May | 76% | 6.4 |
| June | 84% | 7.5 |
| July | 90% | 7.7 |
| August | 89% | 6.6 |
| September | 86% | 5.1 |
| October | 80% | 3.5 |
| November | 72% | 2.1 |
| December | 66% | 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 Bellevue need?
A normal year in Bellevue brings 7,012 heating degree days, 31% more than the median U.S. place (5,373), and 434 cooling degree days, 52% 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 2,192 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,228 | 0 |
| February | 1,023 | 0 |
| March | 851 | 0 |
| April | 548 | 0 |
| May | 334 | 1 |
| June | 136 | 42 |
| July | 20 | 197 |
| August | 22 | 155 |
| September | 178 | 38 |
| October | 538 | 1 |
| November | 906 | 0 |
| December | 1,229 | 0 |
| Year (annual) | 7,012 | 434 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00100774. 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 Bellevue been warmer than normal lately?
2025 averaged 48.7°F, 1.8°F above the 1991-2020 normal of 46.9°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 48.0°F | +1.1°F | 13.76 |
| 2022 | 45.6°F | −1.3°F | 11.87 |
| 2023 | 44.9°F | −2.0°F | 14.39 |
| 2024 | 48.7°F | +1.8°F | 12.09 |
| 2025 | 48.7°F | +1.8°F | 14.66 |
Source: observed years: ACIS, station USC00100774. A year counts only with all twelve months complete.
How does Bellevue's climate compare?
Bellevue is warmer than 46 of the other 84 places with their own NOAA record in Idaho, and wetter than 48. Across the 7,247 U.S. stations with normals, its annual mean of 46.9°F is warmer than 27%.
In the Köppen classification computed from these normals, Bellevue 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 Bellevue share this climate record?
Hailey 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.
- Hailey, ID9,976 people · 4 mi NW
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 Bellevue's climate
What is the coldest month in Bellevue?
January, with a normal high of 35°F and a normal low of 16°F. The warmest is July (88°F by day, 54°F at night).
Does it snow in Bellevue?
Yes. NOAA publishes no 1991-2020 snowfall normal for Bellevue's NOAA station; the nearest record that keeps one, Picabo (15 miles away), records 46 inches of snow in a normal year.
What is the rainiest month in Bellevue?
December, with 2.44 in of precipitation in a normal year; the driest is July with 0.61 in.
What plant hardiness zone is Bellevue in?
The USDA's 2023 map puts Bellevue in zone 6a in ZIP code 83333, the nearest ZIP area.
How late can frost come in Bellevue?
In half of years the last 32°F night comes after May 13; in one year in ten it comes after June 3. Waiting until June 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Picabo, ID14 miles from this station, 42.4°F a year
- Ketchum, ID16 miles from this station, 40.2°F a year
- Fairfield, ID28 miles from this station, 42.1°F a year
- Richfield, ID29 miles from this station, 46.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made