Harvey, North Dakota climate: Normal weather by month, frost dates and records
Harvey's normal year runs from −2°F January nights to 81°F July afternoons, with 19.3 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 4.3°C, January lows of −19°C, July highs of 27°C, 489 mm of precipitation a year.
- NOAA stationHarvey (4 mi NE)
- Station IDUSC00324013
- Location47.81°N 99.88°W
- Elevation1,611 ft (491 m)
- Population1,564
On October 23, the normal high in Harvey is 50°F and the normal low 27°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Harvey.
- Jan 17° -2°
- Feb 22° 2°
- Mar 35° 15°
- Apr 52° 29°
- May 66° 42°
- Jun 75° 53°
- Jul 81° 57°
- Aug 80° 54°
- Sep 71° 45°
- Oct 54° 31°
- Nov 36° 16°
- Dec 22° 4°
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 Harvey each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of −2°F. The most precipitation falls in June (3.62 in), the least in January (0.41 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 17°F | −2°F | 7.6°F | 0.41 | – | <1 | 31 | 8 h 50 min |
| February | 22°F | 2°F | 11.7°F | 0.41 | – | <1 | 28 | 10 h 10 min |
| March | 35°F | 15°F | 24.9°F | 0.73 | – | <1 | 29 | 11 h 50 min |
| April | 52°F | 29°F | 40.4°F | 1.07 | – | <1 | 19 | 13 h 40 min |
| May | 66°F | 42°F | 54.1°F | 2.69 | – | <1 | 5 | 15 h 10 min |
| June | 75°F | 53°F | 63.9°F | 3.62 | – | 2 | <1 | 16 h |
| July | 81°F | 57°F | 68.7°F | 3.14 | – | 4 | <1 | 15 h 40 min |
| August | 80°F | 54°F | 66.6°F | 2.34 | – | 4 | <1 | 14 h 20 min |
| September | 71°F | 45°F | 57.5°F | 1.84 | – | 1 | 2 | 12 h 40 min |
| October | 54°F | 31°F | 42.4°F | 1.41 | – | <1 | 17 | 11 h |
| November | 36°F | 16°F | 26.1°F | 0.69 | – | <1 | 28 | 9 h 20 min |
| December | 22°F | 4°F | 13.2°F | 0.90 | – | <1 | 31 | 8 h 30 min |
| Year (annual) | 51°F | 29°F | 39.8°F | 19.25 | – | 11 | 189 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −8°C | −19°C | −13.6°C | 10 mm |
| February | −6°C | −17°C | −11.3°C | 10 mm |
| March | 1°C | −9°C | −3.9°C | 19 mm |
| April | 11°C | −2°C | 4.7°C | 27 mm |
| May | 19°C | 6°C | 12.3°C | 68 mm |
| June | 24°C | 12°C | 17.7°C | 92 mm |
| July | 27°C | 14°C | 20.4°C | 80 mm |
| August | 26°C | 12°C | 19.2°C | 59 mm |
| September | 21°C | 7°C | 14.2°C | 47 mm |
| October | 12°C | −1°C | 5.8°C | 36 mm |
| November | 2°C | −9°C | −3.3°C | 18 mm |
| December | −6°C | −15°C | −10.4°C | 23 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Fessenden (16 miles away), gets 34 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00324013; 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 Harvey?
Normal highs sit between 65°F and 85°F in May, 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 USC00324013.
When is the last frost in Harvey?
In Harvey, the last spring frost (32°F) comes after May 12 in half of years and after May 25 in one year in ten; the first autumn frost comes before September 26 in half of years and before September 14 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 121 year in 10 after May 25; 9 in 10 after April 30
- First autumn frost, half of years before
- September 261 year in 10 before September 14; 9 in 10 before October 6
NOAA puts the median frost-free season at 135 days, and the season without a hard freeze (28°F) at 151 days.
A hard freeze (28°F) comes after May 4 in half of springs and before October 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Harvey in zone 4a in ZIP code 58341, the nearest ZIP area.
Frost dates for every NOAA station in North Dakota · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00324013; 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 Harvey?
In a normal year in Harvey, 11 days a year reach 90°F (1 of them 100°F or more) and 189 nights fall to 32°F or colder.
- Days at 90°F or more
- 11a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 189a normal year
- Days that stay below freezing
- 92high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00324013.
How sunny is Harvey?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Harvey, 3.9 kWh per square metre a day. February is the sunniest month (86%) and November the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 82% | 1.8 |
| February | 86% | 3.0 |
| March | 78% | 4.0 |
| April | 73% | 4.9 |
| May | 72% | 5.7 |
| June | 75% | 6.2 |
| July | 83% | 6.5 |
| August | 81% | 5.4 |
| September | 77% | 4.0 |
| October | 69% | 2.5 |
| November | 67% | 1.6 |
| December | 68% | 1.2 |
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 Harvey need?
A normal year in Harvey brings 9,518 heating degree days, 77% more than the median U.S. place (5,373), and 362 cooling degree days, 60% 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 2,035 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,781 | 0 |
| February | 1,491 | 0 |
| March | 1,245 | 0 |
| April | 738 | 0 |
| May | 350 | 13 |
| June | 97 | 65 |
| July | 29 | 143 |
| August | 61 | 112 |
| September | 252 | 27 |
| October | 700 | 1 |
| November | 1,169 | 0 |
| December | 1,607 | 0 |
| Year (annual) | 9,518 | 362 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00324013. 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 Harvey been warmer than normal lately?
2025 averaged 40.8°F, 1.0°F above the 1991-2020 normal of 39.8°F. 2 of the 2 complete years since 2024 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2024 | 42.7°F | +2.9°F | – |
| 2025 | 40.8°F | +1.0°F | – |
Source: observed years: ACIS, station USC00324013. A year counts only with all twelve months complete.
How does Harvey's climate compare?
Harvey is warmer than 27 of the other 91 places with their own NOAA record in North Dakota, and wetter than 42. Across the 7,247 U.S. stations with normals, its annual mean of 39.8°F is warmer than 5%.
In the Köppen classification computed from these normals, Harvey 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 Harvey 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.
- Selz, ND71 people · 4 mi N
- Martin, ND61 people · 11 mi W
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 Harvey's climate
What is the coldest month in Harvey?
January, with a normal high of 17°F and a normal low of −2°F. The warmest is July (81°F by day, 57°F at night).
Does it snow in Harvey?
Yes. NOAA publishes no 1991-2020 snowfall normal for Harvey's NOAA station; the nearest record that keeps one, Fessenden (16 miles away), records 34 inches of snow in a normal year.
What is the rainiest month in Harvey?
June, with 3.62 in of precipitation in a normal year; the driest is January with 0.41 in.
What plant hardiness zone is Harvey in?
The USDA's 2023 map puts Harvey in zone 4a in ZIP code 58341, the nearest ZIP area.
How late can frost come in Harvey?
In half of years the last 32°F night comes after May 12; in one year in ten it comes after May 25. Waiting until May 25 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
- Fessenden, ND16 miles from this station, 40.9°F a year
- Esmond, ND24 miles from this station, 39.1°F a year
- Drake, ND26 miles from this station, 39.5°F a year
- Butte, ND33 miles from this station, 41.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made