Hebron, North Dakota climate: Normal weather by month, frost dates and records
Hebron's normal year runs from 3°F January nights to 82°F July afternoons, with 18.4 inches of precipitation and 41 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 5.3°C, January lows of −16°C, July highs of 28°C, 468 mm of precipitation a year.
- NOAA stationHebron
- Station IDUSC00324102
- Location46.91°N 102.04°W
- Elevation2,160 ft (658 m)
- From the centerunder 1 mile
- Population788
On October 23, the normal high in Hebron is 52°F and the normal low 27°F, and the chance of measurable rain or snow is 18%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Hebron.
- Jan 24° 3°
- Feb 28° 7°
- Mar 40° 17°
- Apr 54° 28°
- May 66° 40°
- Jun 75° 50°
- Jul 82° 55°
- Aug 82° 53°
- Sep 72° 43°
- Oct 56° 30°
- Nov 40° 18°
- Dec 28° 8°
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 Hebron each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 3°F. The most precipitation falls in June (3.30 in), the least in January (0.41 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 24°F | 3°F | 13.4°F | 0.41 | 5.2 | 4 | <1 | 31 | 8 h 50 min |
| February | 28°F | 7°F | 17.2°F | 0.48 | 6.2 | 4 | <1 | 28 | 10 h 20 min |
| March | 40°F | 17°F | 28.3°F | 0.86 | 7.4 | 5 | <1 | 29 | 11 h 50 min |
| April | 54°F | 28°F | 40.6°F | 1.51 | 4.0 | 7 | <1 | 20 | 13 h 30 min |
| May | 66°F | 40°F | 52.8°F | 2.58 | 0.8 | 11 | <1 | 6 | 15 h |
| June | 75°F | 50°F | 62.6°F | 3.30 | 0.0 | 11 | 1 | <1 | 15 h 50 min |
| July | 82°F | 55°F | 68.7°F | 2.86 | 0.0 | 9 | 6 | <1 | 15 h 30 min |
| August | 82°F | 53°F | 67.3°F | 2.00 | 0.0 | 7 | 6 | <1 | 14 h 20 min |
| September | 72°F | 43°F | 57.2°F | 1.89 | 0.2 | 7 | 2 | 3 | 12 h 40 min |
| October | 56°F | 30°F | 42.8°F | 1.48 | 2.5 | 6 | <1 | 18 | 11 h |
| November | 40°F | 18°F | 29.1°F | 0.62 | 6.6 | 4 | <1 | 28 | 9 h 30 min |
| December | 28°F | 8°F | 18.3°F | 0.43 | 7.7 | 5 | <1 | 31 | 8 h 30 min |
| Year (annual) | 54°F | 29°F | 41.5°F | 18.42 | 40.6 | 80 | 15 | 194 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −5°C | −16°C | −10.3°C | 10 mm | 13 cm |
| February | −2°C | −14°C | −8.2°C | 12 mm | 16 cm |
| March | 4°C | −8°C | −2.1°C | 22 mm | 19 cm |
| April | 12°C | −2°C | 4.8°C | 38 mm | 10 cm |
| May | 19°C | 4°C | 11.6°C | 66 mm | 2 cm |
| June | 24°C | 10°C | 17.0°C | 84 mm | 0 cm |
| July | 28°C | 13°C | 20.4°C | 73 mm | 0 cm |
| August | 28°C | 11°C | 19.6°C | 51 mm | 0 cm |
| September | 22°C | 6°C | 14.0°C | 48 mm | 1 cm |
| October | 13°C | −1°C | 6.0°C | 38 mm | 6 cm |
| November | 4°C | −8°C | −1.6°C | 16 mm | 17 cm |
| December | −2°C | −13°C | −7.6°C | 11 mm | 20 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00324102; 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 Hebron?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (7).
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 USC00324102.
When is the last frost in Hebron?
In Hebron, the last spring frost (32°F) comes after May 19 in half of years and after June 2 in one year in ten; the first autumn frost comes before September 21 in half of years and before September 7 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 191 year in 10 after June 2; 9 in 10 after May 7
- First autumn frost, half of years before
- September 211 year in 10 before September 7; 9 in 10 before October 4
NOAA puts the median frost-free season at 123 days, and the season without a hard freeze (28°F) at 141 days.
A hard freeze (28°F) comes after May 10 in half of springs and before September 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hebron in zone 4a in ZIP code 58638, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Hebron's NOAA station is in zone 4a: the coldest night of a typical year reaches −27°F (25 complete years).
Frost dates for every NOAA station in North Dakota · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00324102; 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 Hebron?
In a normal year in Hebron, 15 days a year reach 90°F (1 of them 100°F or more), 194 nights fall to 32°F or colder and 80 days bring measurable precipitation.
- Days at 90°F or more
- 15a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 194a normal year
- Days that stay below freezing
- 77high of 32°F or less
- Days with 0.01 inch of precipitation
- 80a normal year
- Days with 1 inch of snow or more
- 18a normal year
The highest temperature in this station's record (since 1963) is 109°F, on July 24, 2007; the lowest is −47°F, on January 29, 1966.
The wettest calendar year on that record is 2019, with 28.78 in; the snowiest season is 2008–09, with 87.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00324102; records: ACIS (NOAA Regional Climate Centers), station USC00324102. Records use complete months only; a month missing more than three days is left out.
How sunny is Hebron?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hebron, 4.1 kWh per square metre a day. July is the sunniest month (87%) and December the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 1.8 |
| February | 78% | 2.8 |
| March | 73% | 3.8 |
| April | 72% | 4.9 |
| May | 73% | 5.9 |
| June | 79% | 6.7 |
| July | 87% | 7.0 |
| August | 84% | 5.8 |
| September | 80% | 4.4 |
| October | 73% | 2.8 |
| November | 73% | 1.8 |
| December | 70% | 1.3 |
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 Hebron need?
A normal year in Hebron brings 8,892 heating degree days, 66% more than the median U.S. place (5,373), and 376 cooling degree days, 59% 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 1,998 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,599 | 0 |
| February | 1,337 | 0 |
| March | 1,139 | 0 |
| April | 731 | 1 |
| May | 387 | 11 |
| June | 125 | 52 |
| July | 38 | 154 |
| August | 59 | 131 |
| September | 261 | 27 |
| October | 689 | 1 |
| November | 1,079 | 0 |
| December | 1,448 | 0 |
| Year (annual) | 8,892 | 376 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00324102. 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 Hebron been warmer than normal lately?
2022 averaged 39.4°F, 2.1°F below the 1991-2020 normal of 41.5°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 39.4°F | −2.1°F | 21.46 | – |
Over 39 complete years from 1964 to 2022, the station's annual mean temperature rose at a fitted 2.9°F per century (+0.16°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00324102; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Hebron's climate compare?
Hebron is warmer than 51 of the other 91 places with their own NOAA record in North Dakota, and wetter than 30. Across the 7,247 U.S. stations with normals, its annual mean of 41.5°F is warmer than 8%.
In the Köppen classification computed from these normals, Hebron is Dfb: continental, no dry season, 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 Hebron share this climate record?
Glen Ullin 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.
- Glen Ullin, ND705 people · 12 mi SE
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 Hebron's climate
What is the coldest month in Hebron?
January, with a normal high of 24°F and a normal low of 3°F. The warmest is July (82°F by day, 55°F at night).
Does it snow in Hebron?
Yes: 41 inches in a normal year, falling on 23 days with 0.1 inch or more, the most in December (7.7 inches).
What is the rainiest month in Hebron?
June, with 3.30 in of precipitation in a normal year; the driest is January with 0.41 in.
What plant hardiness zone is Hebron in?
The USDA's 2023 map puts Hebron in zone 4a in ZIP code 58638, the nearest ZIP area. By the same method at Hebron's NOAA station, the coldest night of a typical year reaches −27°F (25 years, 1991-2020): zone 4a.
How late can frost come in Hebron?
In half of years the last 32°F night comes after May 19; in one year in ten it comes after June 2. Waiting until June 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- North Dakota climateThe statewide normals and every place in the state
- Richardton, ND13 miles from this station, 43.3°F a year
- Taylor, ND22 miles from this station, 42.5°F a year
- Heart Butte Dam, ND24 miles from this station, 42.6°F a year
- New Salem, ND26 miles from this station, 41.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made