Harrison, Arkansas climate: Normal weather by month, frost dates and records
Harrison's normal year runs from 27°F January nights to 89°F July afternoons, with 44.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.6°C, January lows of −3°C, July highs of 32°C, 1,130 mm of precipitation a year.
- NOAA stationHarrison Boone County Airport
- Station IDUSW00013971
- Location36.27°N 93.16°W
- Elevation1,374 ft (419 m)
- From the center3 miles
- Population13,723
On October 24, the normal high in Harrison is 68°F and the normal low 45°F, and the chance of measurable rain or snow is 30%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Harrison.
- Jan 47° 27°
- Feb 51° 31°
- Mar 60° 38°
- Apr 70° 47°
- May 77° 56°
- Jun 85° 64°
- Jul 89° 68°
- Aug 89° 67°
- Sep 81° 59°
- Oct 71° 48°
- Nov 59° 38°
- Dec 49° 30°
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 Harrison each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 27°F. The most precipitation falls in April (4.98 in), the least in February (2.42 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 47°F | 27°F | 37.0°F | 2.67 | 8 | <1 | 21 | 10 h |
| February | 51°F | 31°F | 40.9°F | 2.42 | 8 | <1 | 16 | 10 h 50 min |
| March | 60°F | 38°F | 49.2°F | 3.91 | 10 | <1 | 9 | 11 h 50 min |
| April | 70°F | 47°F | 58.3°F | 4.98 | 10 | <1 | 2 | 13 h |
| May | 77°F | 56°F | 66.2°F | 4.81 | 12 | 1 | <1 | 14 h |
| June | 85°F | 64°F | 74.4°F | 3.85 | 9 | 6 | <1 | 14 h 40 min |
| July | 89°F | 68°F | 78.5°F | 3.67 | 9 | 16 | <1 | 14 h 20 min |
| August | 89°F | 67°F | 77.6°F | 3.42 | 8 | 14 | <1 | 13 h 30 min |
| September | 81°F | 59°F | 69.9°F | 4.06 | 8 | 4 | <1 | 12 h 30 min |
| October | 71°F | 48°F | 59.4°F | 3.81 | 9 | <1 | 1 | 11 h 20 min |
| November | 59°F | 38°F | 48.5°F | 3.96 | 8 | <1 | 8 | 10 h 20 min |
| December | 49°F | 30°F | 39.7°F | 2.94 | 8 | <1 | 18 | 9 h 40 min |
| Year (annual) | 69°F | 48°F | 58.3°F | 44.50 | 108 | 41 | 76 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 8°C | −3°C | 2.8°C | 68 mm |
| February | 11°C | −1°C | 4.9°C | 61 mm |
| March | 16°C | 3°C | 9.6°C | 99 mm |
| April | 21°C | 8°C | 14.6°C | 126 mm |
| May | 25°C | 13°C | 19.0°C | 122 mm |
| June | 29°C | 18°C | 23.6°C | 98 mm |
| July | 32°C | 20°C | 25.8°C | 93 mm |
| August | 32°C | 19°C | 25.3°C | 87 mm |
| September | 27°C | 15°C | 21.1°C | 103 mm |
| October | 22°C | 9°C | 15.2°C | 97 mm |
| November | 15°C | 3°C | 9.2°C | 101 mm |
| December | 10°C | −1°C | 4.3°C | 75 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. Harrison's own co-op station Harrison station does: 10 inches of snow in a normal year (see the other stations below).
Source: NOAA NCEI 1991-2020 monthly normals, station USW00013971; 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 Harrison?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, September has the fewest days with rain (8).
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 USW00013971.
When is the last frost in Harrison?
In Harrison, the last spring frost (32°F) comes after April 3 in half of years and after April 21 in one year in ten; the first autumn frost comes before October 30 in half of years and before October 16 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
- April 31 year in 10 after April 21; 9 in 10 after March 17
- First autumn frost, half of years before
- October 301 year in 10 before October 16; 9 in 10 before November 14
NOAA puts the median frost-free season at 210 days, and the season without a hard freeze (28°F) at 232 days.
A hard freeze (28°F) comes after March 24 in half of springs and before November 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Harrison in zone 7b in ZIP code 72601, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Harrison's NOAA station is in zone 7a: the coldest night of a typical year reaches 5°F (29 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Arkansas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00013971; 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 Harrison?
In a normal year in Harrison, 41 days a year reach 90°F (3 of them 100°F or more), 76 nights fall to 32°F or colder and 108 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
- 76a normal year
- Days that stay below freezing
- 10high of 32°F or less
- Days with 0.01 inch of precipitation
- 108a normal year
The highest temperature in Harrison's official record (kept by the National Weather Service since 1892) is 112°F, on July 18, 1936; the lowest is −20°F, on February 13, 1905.
The wettest calendar year on that record is 1990, with 62.91 in; the snowiest season is 1977–78, with 32.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00013971; records: ACIS (NOAA Regional Climate Centers), NWS threaded record HROthr. Records use complete months only; a month missing more than three days is left out.
How sunny is Harrison?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Harrison, 4.4 kWh per square metre a day. June is the sunniest month (81%) and February the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.5 |
| February | 67% | 3.0 |
| March | 69% | 4.1 |
| April | 72% | 5.2 |
| May | 73% | 5.8 |
| June | 81% | 6.6 |
| July | 81% | 6.4 |
| August | 81% | 5.7 |
| September | 81% | 4.9 |
| October | 77% | 3.7 |
| November | 74% | 2.7 |
| December | 69% | 2.1 |
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 Harrison need?
A normal year in Harrison brings 3,883 heating degree days, 28% fewer than the median U.S. place (5,373), and 1,475 cooling degree days, 63% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,463 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 867 | 0 |
| February | 676 | 1 |
| March | 497 | 8 |
| April | 232 | 31 |
| May | 75 | 112 |
| June | 4 | 286 |
| July | 0 | 419 |
| August | 1 | 391 |
| September | 34 | 182 |
| October | 214 | 40 |
| November | 500 | 5 |
| December | 785 | 0 |
| Year (annual) | 3,883 | 1,475 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00013971. 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 Harrison been warmer than normal lately?
2025 averaged 60.2°F, 1.9°F above the 1991-2020 normal of 58.3°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 58.9°F | +0.6°F | 46.85 |
| 2022 | 58.4°F | +0.1°F | 43.23 |
| 2023 | 60.0°F | +1.7°F | 44.64 |
| 2024 | 60.8°F | +2.5°F | 48.95 |
| 2025 | 60.2°F | +1.9°F | 40.31 |
Over 60 complete years from 1948 to 2025, the station's annual mean temperature rose at a fitted 2.3°F per century (+0.13°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00013971; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Harrison's climate compare?
Harrison is warmer than 13 of the other 85 places with their own NOAA record in Arkansas, and wetter than 3. Across the 7,247 U.S. stations with normals, its annual mean of 58.3°F is warmer than 70%.
In the Köppen classification computed from these normals, Harrison is Cfa: temperate, no dry season, hot 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 Harrison share this climate record?
5 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.
- Batavia, AR444 people · 4 mi W
- Bergman, AR428 people · 9 mi E
- Bellefonte, AR421 people · 8 mi SE
- Alpena, AR390 people · 8 mi W
- Valley Springs, AR182 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.
What do Harrison's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Harrison. This page uses Harrison Boone County Airport; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Harrison station USC00033164 | 3 mi S | 1,132 ft | 58.6°F | 28°F | 89°F | 47.5 | 10 | March 22 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Harrison's climate
What is the coldest month in Harrison?
January, with a normal high of 47°F and a normal low of 27°F. The warmest is July (89°F by day, 68°F at night).
Does it snow in Harrison?
Yes. NOAA publishes no 1991-2020 snowfall normal for Harrison's NOAA station; Harrison's own co-op station Harrison station records 10 inches of snow in a normal year.
What is the rainiest month in Harrison?
April, with 4.98 in of precipitation in a normal year; the driest is February with 2.42 in.
What plant hardiness zone is Harrison in?
The USDA's 2023 map puts Harrison in zone 7b in ZIP code 72601, the nearest ZIP area. By the same method at Harrison's NOAA station, the coldest night of a typical year reaches 5°F (29 years, 1991-2020): zone 7a.
How late can frost come in Harrison?
In half of years the last 32°F night comes after April 3; in one year in ten it comes after April 21. Waiting until April 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Arkansas climateThe statewide normals and every place in the state
- Lead Hill, AR17 miles from this station, 56.1°F a year
- Branson, MO19 miles from this station, 57.5°F a year
- Kingston, AR27 miles from this station, 55.5°F a year
- Ozark Beach, MO29 miles from this station, 58.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made