Arkadelphia, Arkansas climate: Normal weather by month, frost dates and records
Arkadelphia's normal year runs from 31°F January nights to 94°F July afternoons, with 54.8 inches of precipitation and 1 inch of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.3°C, January lows of −1°C, July highs of 34°C, 1,393 mm of precipitation a year.
- NOAA stationArkadelphia (2 mi N)
- Station IDUSC00030220
- Location34.14°N 93.06°W
- Elevation196 ft (60 m)
- From the center1 miles
- Population9,894
On October 23, the normal high in Arkadelphia is 75°F and the normal low 48°F, and the chance of measurable rain or snow is 20%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Arkadelphia.
- Jan 55° 31°
- Feb 59° 34°
- Mar 68° 42°
- Apr 76° 50°
- May 83° 60°
- Jun 90° 68°
- Jul 94° 71°
- Aug 94° 70°
- Sep 88° 63°
- Oct 78° 51°
- Nov 65° 40°
- Dec 57° 34°
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 Arkadelphia each month?
July is the warmest month, with normal highs of 94°F; January the coldest, with normal lows of 31°F. The most precipitation falls in May (6.60 in), the least in August (3.32 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 55°F | 31°F | 42.7°F | 4.03 | 0.4 | 7 | <1 | 19 | 10 h 10 min |
| February | 59°F | 34°F | 46.3°F | 4.20 | 0.6 | 7 | <1 | 15 | 11 h |
| March | 68°F | 42°F | 54.5°F | 4.88 | 0.3 | 7 | <1 | 6 | 11 h 50 min |
| April | 76°F | 50°F | 63.2°F | 5.33 | 0.0 | 7 | <1 | 1 | 13 h |
| May | 83°F | 60°F | 71.3°F | 6.60 | 0.0 | 7 | 3 | <1 | 13 h 50 min |
| June | 90°F | 68°F | 79.1°F | 3.89 | 0.0 | 6 | 16 | <1 | 14 h 20 min |
| July | 94°F | 71°F | 82.4°F | 4.09 | 0.0 | 6 | 24 | <1 | 14 h 10 min |
| August | 94°F | 70°F | 81.8°F | 3.32 | 0.0 | 5 | 22 | <1 | 13 h 30 min |
| September | 88°F | 63°F | 75.3°F | 3.77 | 0.0 | 5 | 11 | <1 | 12 h 30 min |
| October | 78°F | 51°F | 64.0°F | 4.92 | 0.0 | 6 | 1 | 1 | 11 h 20 min |
| November | 65°F | 40°F | 52.6°F | 4.40 | 0.0 | 7 | <1 | 8 | 10 h 30 min |
| December | 57°F | 34°F | 45.4°F | 5.41 | 0.1 | 7 | <1 | 17 | 9 h 50 min |
| Year (annual) | 75°F | 51°F | 63.2°F | 54.84 | 1.4 | 76 | 77 | 66 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 13°C | −1°C | 5.9°C | 102 mm | 1 cm |
| February | 15°C | 1°C | 7.9°C | 107 mm | 2 cm |
| March | 20°C | 5°C | 12.5°C | 124 mm | 1 cm |
| April | 25°C | 10°C | 17.3°C | 135 mm | 0 cm |
| May | 28°C | 15°C | 21.8°C | 168 mm | 0 cm |
| June | 32°C | 20°C | 26.2°C | 99 mm | 0 cm |
| July | 34°C | 22°C | 28.0°C | 104 mm | 0 cm |
| August | 34°C | 21°C | 27.7°C | 84 mm | 0 cm |
| September | 31°C | 17°C | 24.1°C | 96 mm | 0 cm |
| October | 25°C | 10°C | 17.8°C | 125 mm | 0 cm |
| November | 18°C | 5°C | 11.4°C | 112 mm | 0 cm |
| December | 14°C | 1°C | 7.4°C | 137 mm | 0 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00030220; 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 Arkadelphia?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, October has the fewest days with rain (6).
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 USC00030220.
When is the last frost in Arkadelphia?
In Arkadelphia, the last spring frost (32°F) comes after March 26 in half of years and after April 11 in one year in ten; the first autumn frost comes before November 4 in half of years and before October 23 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
- March 261 year in 10 after April 11; 9 in 10 after March 6
- First autumn frost, half of years before
- November 41 year in 10 before October 23; 9 in 10 before November 21
NOAA puts the median frost-free season at 225 days, and the season without a hard freeze (28°F) at 249 days.
A hard freeze (28°F) comes after March 11 in half of springs and before November 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Arkadelphia in zone 8a in ZIP code 71998, the nearest ZIP area.
Frost dates for every NOAA station in Arkansas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00030220; 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 Arkadelphia?
In a normal year in Arkadelphia, 77 days a year reach 90°F (8 of them 100°F or more), 66 nights fall to 32°F or colder and 76 days bring measurable precipitation.
- Days at 90°F or more
- 77a normal year
- Days at 100°F or more
- 8a normal year
- Nights at 32°F or colder
- 66a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 76a normal year
- Days with 1 inch of snow or more
- 1a normal year
The highest temperature in this station's record (since 1899) is 113°F, on August 6, 2011; the lowest is −6°F, on February 2, 1951.
The wettest calendar year on that record is 1973, with 82.15 in; the snowiest season is 1965–66, with 19.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00030220; records: ACIS (NOAA Regional Climate Centers), station USC00030220. Records use complete months only; a month missing more than three days is left out.
How sunny is Arkadelphia?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Arkadelphia, 4.4 kWh per square metre a day. August is the sunniest month (81%) and February the cloudiest (64%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.5 |
| February | 64% | 3.0 |
| March | 69% | 4.1 |
| April | 72% | 5.2 |
| May | 73% | 5.7 |
| June | 80% | 6.4 |
| July | 81% | 6.3 |
| August | 81% | 5.7 |
| September | 80% | 4.9 |
| October | 76% | 3.8 |
| November | 72% | 2.8 |
| December | 69% | 2.3 |
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 Arkadelphia need?
A normal year in Arkadelphia brings 2,814 heating degree days, 48% fewer than the median U.S. place (5,373), and 2,196 cooling degree days, 2.4 times 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 5,618 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 691 | 0 |
| February | 525 | 1 |
| March | 342 | 16 |
| April | 121 | 66 |
| May | 20 | 215 |
| June | 0 | 422 |
| July | 0 | 539 |
| August | 0 | 521 |
| September | 7 | 316 |
| October | 119 | 90 |
| November | 379 | 9 |
| December | 609 | 2 |
| Year (annual) | 2,814 | 2,196 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00030220. 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 Arkadelphia been warmer than normal lately?
2021 averaged 61.5°F, 1.7°F below the 1991-2020 normal of 63.2°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 61.5°F | −1.7°F | – | 16.0 |
Over 56 complete years from 1940 to 2025, the station's annual mean temperature rose at a fitted 0.9°F per century (+0.05°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00030220; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Arkadelphia's climate compare?
Arkadelphia is warmer than 76 of the other 85 places with their own NOAA record in Arkansas, and wetter than 65. Across the 7,247 U.S. stations with normals, its annual mean of 63.2°F is warmer than 83%.
In the Köppen classification computed from these normals, Arkadelphia 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 Arkadelphia 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.
- Caddo Valley, AR590 people · 3 mi NW
- Gum Springs, AR91 people · 6 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 Arkadelphia's climate
What is the coldest month in Arkadelphia?
January, with a normal high of 55°F and a normal low of 31°F. The warmest is July (94°F by day, 71°F at night).
Does it snow in Arkadelphia?
Yes: 1 inch in a normal year, falling on 1 days with 0.1 inch or more, the most in February (0.6 inches).
What is the rainiest month in Arkadelphia?
May, with 6.60 in of precipitation in a normal year; the driest is August with 3.32 in.
What plant hardiness zone is Arkadelphia in?
The USDA's 2023 map puts Arkadelphia in zone 8a in ZIP code 71998, the nearest ZIP area.
How late can frost come in Arkadelphia?
In half of years the last 32°F night comes after March 26; in one year in ten it comes after April 11. Waiting until April 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Arkansas climateThe statewide normals and every place in the state
- Degray Lake State Park, AR9 miles from this station, 60.9°F a year
- Hot Springs, AR10 miles from this station, 63.1°F a year
- Sparkman, AR21 miles from this station, 61.9°F a year
- Malvern, AR22 miles from this station, 61.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made