Hazelton, Idaho climate: Normal weather by month, frost dates and records
Hazelton's normal year runs from 20°F January nights to 89°F July afternoons, with 10.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.2°C, January lows of −7°C, July highs of 32°C, 272 mm of precipitation a year.
- NOAA stationHazelton
- Station IDUSC00104140
- Location42.60°N 114.14°W
- Elevation4,060 ft (1,238 m)
- Population828
On October 22, the normal high in Hazelton is 60°F and the normal low 32°F, and the chance of measurable rain or snow is 14%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Hazelton.
- Jan 36° 20°
- Feb 41° 23°
- Mar 52° 29°
- Apr 59° 34°
- May 69° 42°
- Jun 79° 49°
- Jul 89° 56°
- Aug 88° 54°
- Sep 78° 45°
- Oct 63° 34°
- Nov 47° 26°
- Dec 36° 20°
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 Hazelton each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 20°F. The most precipitation falls in December (1.55 in), the least in July (0.20 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 36°F | 20°F | 27.8°F | 1.34 | 8 | <1 | 30 | 9 h 20 min |
| February | 41°F | 23°F | 31.9°F | 0.84 | 6 | <1 | 25 | 10 h 30 min |
| March | 52°F | 29°F | 40.7°F | 1.05 | 6 | <1 | 22 | 11 h 50 min |
| April | 59°F | 34°F | 46.4°F | 0.97 | 6 | <1 | 13 | 13 h 20 min |
| May | 69°F | 42°F | 55.5°F | 1.25 | 6 | 1 | 2 | 14 h 30 min |
| June | 79°F | 49°F | 63.7°F | 0.71 | 3 | 5 | <1 | 15 h 20 min |
| July | 89°F | 56°F | 72.6°F | 0.20 | 2 | 17 | <1 | 15 h |
| August | 88°F | 54°F | 70.8°F | 0.29 | 2 | 15 | <1 | 14 h |
| September | 78°F | 45°F | 61.2°F | 0.50 | 3 | 3 | 1 | 12 h 30 min |
| October | 63°F | 34°F | 48.4°F | 0.96 | 5 | <1 | 12 | 11 h 10 min |
| November | 47°F | 26°F | 36.5°F | 1.06 | 6 | <1 | 23 | 9 h 50 min |
| December | 36°F | 20°F | 28.0°F | 1.55 | 9 | <1 | 29 | 9 h |
| Year (annual) | 61°F | 36°F | 48.6°F | 10.72 | 61 | 41 | 157 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 2°C | −7°C | −2.3°C | 34 mm |
| February | 5°C | −5°C | −0.1°C | 21 mm |
| March | 11°C | −1°C | 4.8°C | 27 mm |
| April | 15°C | 1°C | 8.0°C | 25 mm |
| May | 21°C | 5°C | 13.1°C | 32 mm |
| June | 26°C | 9°C | 17.6°C | 18 mm |
| July | 32°C | 13°C | 22.6°C | 5 mm |
| August | 31°C | 12°C | 21.6°C | 7 mm |
| September | 25°C | 7°C | 16.2°C | 13 mm |
| October | 17°C | 1°C | 9.1°C | 24 mm |
| November | 8°C | −4°C | 2.5°C | 27 mm |
| December | 2°C | −7°C | −2.2°C | 39 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Twin Falls (6 mi E) (11 miles away), gets 24 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00104140; 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 Hazelton?
Normal highs sit between 65°F and 85°F in May, June and September. 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 USC00104140.
When is the last frost in Hazelton?
In Hazelton, the last spring frost (32°F) comes after May 7 in half of years and after May 26 in one year in ten; the first autumn frost comes before October 5 in half of years and before September 19 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 71 year in 10 after May 26; 9 in 10 after April 24
- First autumn frost, half of years before
- October 51 year in 10 before September 19; 9 in 10 before October 19
NOAA puts the median frost-free season at 149 days, and the season without a hard freeze (28°F) at 176 days.
A hard freeze (28°F) comes after April 23 in half of springs and before October 17 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hazelton in zone 6b in ZIP code 83335, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Hazelton's NOAA station is in zone 6b: the coldest night of a typical year reaches −3°F (25 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 USC00104140; 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 Hazelton?
In a normal year in Hazelton, 41 days a year reach 90°F (3 of them 100°F or more), 157 nights fall to 32°F or colder and 61 days bring measurable precipitation.
- Days at 90°F or more
- 41a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 157a normal year
- Days that stay below freezing
- 24high of 32°F or less
- Days with 0.01 inch of precipitation
- 61a normal year
The highest temperature in this station's record (since 1917) is 113°F, on August 12, 1940; the lowest is −34°F, on January 19, 1922.
The wettest calendar year on that record is 1963, with 15.55 in; the snowiest season is 1948–49, with 63.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00104140; records: ACIS (NOAA Regional Climate Centers), station USC00104140. Records use complete months only; a month missing more than three days is left out.
How sunny is Hazelton?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hazelton, 4.6 kWh per square metre a day. July is the sunniest month (90%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 1.9 |
| February | 69% | 2.8 |
| March | 72% | 4.0 |
| April | 76% | 5.5 |
| May | 80% | 6.7 |
| June | 86% | 7.6 |
| July | 90% | 7.6 |
| August | 89% | 6.6 |
| September | 87% | 5.3 |
| October | 82% | 3.6 |
| November | 73% | 2.2 |
| December | 62% | 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 Hazelton need?
A normal year in Hazelton brings 6,502 heating degree days, 21% more than the median U.S. place (5,373), and 562 cooling degree days, 38% 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 2,428 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,153 | 0 |
| February | 927 | 0 |
| March | 753 | 0 |
| April | 560 | 0 |
| May | 307 | 12 |
| June | 106 | 67 |
| July | 10 | 247 |
| August | 17 | 196 |
| September | 154 | 40 |
| October | 514 | 1 |
| November | 855 | 0 |
| December | 1,147 | 0 |
| Year (annual) | 6,502 | 562 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00104140. 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 Hazelton been warmer than normal lately?
Over 53 complete years from 1949 to 2016, the station's annual mean temperature rose at a fitted 1.0°F per century (+0.06°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 Hazelton's climate compare?
Hazelton is warmer than 58 of the other 84 places with their own NOAA record in Idaho, and wetter than 22. Across the 7,247 U.S. stations with normals, its annual mean of 48.6°F is warmer than 34%.
In the Köppen classification computed from these normals, Hazelton 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 Hazelton share this climate record?
2 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.
- Eden, ID406 people · 4 mi W
- Murtaugh, ID123 people · 7 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 Hazelton's climate
What is the coldest month in Hazelton?
January, with a normal high of 36°F and a normal low of 20°F. The warmest is July (89°F by day, 56°F at night).
Does it snow in Hazelton?
Yes. NOAA publishes no 1991-2020 snowfall normal for Hazelton's NOAA station; the nearest record that keeps one, Twin Falls (6 mi E) (11 miles away), records 24 inches of snow in a normal year.
What is the rainiest month in Hazelton?
December, with 1.55 in of precipitation in a normal year; the driest is July with 0.20 in.
What plant hardiness zone is Hazelton in?
The USDA's 2023 map puts Hazelton in zone 6b in ZIP code 83335, the nearest ZIP area. By the same method at Hazelton's NOAA station, the coldest night of a typical year reaches −3°F (25 years, 1991-2020): zone 6b.
How late can frost come in Hazelton?
In half of years the last 32°F night comes after May 7; in one year in ten it comes after May 26. Waiting until May 26 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Twin Falls-KMVT, ID16 miles from this station, 51.6°F a year
- Jerome, ID19 miles from this station, 50.2°F a year
- Paul, ID19 miles from this station, 47.0°F a year
- Burley, ID19 miles from this station, 49.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made