Chapman, Kansas climate: Normal weather by month, frost dates and records
Chapman's normal year runs from 17°F January nights to 90°F July afternoons, with 33.5 inches of precipitation and 7 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.5°C, January lows of −9°C, July highs of 32°C, 850 mm of precipitation a year.
- NOAA stationChapman
- Station IDUSC00141435
- Location38.96°N 97.01°W
- Elevation1,111 ft (339 m)
- From the centerunder 1 mile
- Population1,388
On October 23, the normal high in Chapman is 67°F and the normal low 40°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 Chapman.
- Jan 40° 17°
- Feb 46° 21°
- Mar 57° 30°
- Apr 67° 41°
- May 76° 53°
- Jun 86° 63°
- Jul 90° 67°
- Aug 89° 65°
- Sep 82° 56°
- Oct 70° 43°
- Nov 56° 30°
- Dec 43° 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 Chapman each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 17°F. The most precipitation falls in May (5.44 in), the least in January (0.74 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 40°F | 17°F | 28.4°F | 0.74 | 3.1 | 4 | <1 | 30 | 9 h 40 min |
| February | 46°F | 21°F | 33.4°F | 1.05 | 1.5 | 4 | <1 | 26 | 10 h 40 min |
| March | 57°F | 30°F | 43.6°F | 2.17 | 1.1 | 6 | <1 | 18 | 11 h 50 min |
| April | 67°F | 41°F | 54.2°F | 3.09 | 0.2 | 8 | <1 | 7 | 13 h 10 min |
| May | 76°F | 53°F | 64.6°F | 5.44 | 0.0 | 10 | 3 | <1 | 14 h 20 min |
| June | 86°F | 63°F | 74.7°F | 4.46 | 0.0 | 8 | 14 | <1 | 14 h 50 min |
| July | 90°F | 67°F | 78.4°F | 4.57 | 0.0 | 8 | 19 | <1 | 14 h 40 min |
| August | 89°F | 65°F | 76.9°F | 3.68 | 0.0 | 8 | 13 | <1 | 13 h 40 min |
| September | 82°F | 56°F | 68.6°F | 3.08 | 0.0 | 6 | 9 | <1 | 12 h 30 min |
| October | 70°F | 43°F | 56.3°F | 2.62 | 0.1 | 6 | 1 | 5 | 11 h 20 min |
| November | 56°F | 30°F | 43.1°F | 1.28 | 0.4 | 4 | <1 | 18 | 10 h 10 min |
| December | 43°F | 20°F | 31.5°F | 1.29 | 1.0 | 4 | <1 | 29 | 9 h 30 min |
| Year (annual) | 67°F | 42°F | 54.5°F | 33.47 | 7.4 | 75 | 57 | 132 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 5°C | −9°C | −2.0°C | 19 mm | 8 cm |
| February | 8°C | −6°C | 0.8°C | 27 mm | 4 cm |
| March | 14°C | −1°C | 6.4°C | 55 mm | 3 cm |
| April | 20°C | 5°C | 12.3°C | 78 mm | 1 cm |
| May | 24°C | 12°C | 18.1°C | 138 mm | 0 cm |
| June | 30°C | 17°C | 23.7°C | 113 mm | 0 cm |
| July | 32°C | 20°C | 25.8°C | 116 mm | 0 cm |
| August | 32°C | 18°C | 24.9°C | 93 mm | 0 cm |
| September | 28°C | 13°C | 20.3°C | 78 mm | 0 cm |
| October | 21°C | 6°C | 13.5°C | 67 mm | 0 cm |
| November | 13°C | −1°C | 6.2°C | 33 mm | 1 cm |
| December | 6°C | −7°C | −0.3°C | 33 mm | 3 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00141435; 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 Chapman?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, September 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 USC00141435.
When is the last frost in Chapman?
In Chapman, the last spring frost (32°F) comes after April 17 in half of years and after April 30 in one year in ten; the first autumn frost comes before October 20 in half of years and before October 3 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 171 year in 10 after April 30; 9 in 10 after April 2
- First autumn frost, half of years before
- October 201 year in 10 before October 3; 9 in 10 before November 2
NOAA puts the median frost-free season at 184 days, and the season without a hard freeze (28°F) at 205 days.
A hard freeze (28°F) comes after April 7 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Chapman in zone 6b in ZIP code 67431, the nearest ZIP area.
Frost dates for every NOAA station in Kansas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00141435; 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 Chapman?
In a normal year in Chapman, 57 days a year reach 90°F (7 of them 100°F or more), 132 nights fall to 32°F or colder and 75 days bring measurable precipitation.
- Days at 90°F or more
- 57a normal year
- Days at 100°F or more
- 7a normal year
- Nights at 32°F or colder
- 132a normal year
- Days that stay below freezing
- 24high of 32°F or less
- Days with 0.01 inch of precipitation
- 75a normal year
- Days with 1 inch of snow or more
- 3a normal year
The highest temperature in this station's record (since 1904) is 116°F, on July 24, 1936; the lowest is −29°F, on January 4, 1947.
The wettest calendar year on that record is 1951, with 56.06 in; the snowiest season is 1983–84, with 45.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00141435; records: ACIS (NOAA Regional Climate Centers), station USC00141435. Records use complete months only; a month missing more than three days is left out.
How sunny is Chapman?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Chapman, 4.5 kWh per square metre a day. July is the sunniest month (85%) and February the cloudiest (73%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 2.4 |
| February | 73% | 3.2 |
| March | 73% | 4.3 |
| April | 75% | 5.4 |
| May | 76% | 6.1 |
| June | 84% | 6.9 |
| July | 85% | 6.7 |
| August | 85% | 6.0 |
| September | 83% | 4.9 |
| October | 79% | 3.7 |
| November | 79% | 2.7 |
| December | 75% | 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 Chapman need?
A normal year in Chapman brings 5,220 heating degree days, 3% fewer than the median U.S. place (5,373), and 1,415 cooling degree days, 56% more than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,034 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,136 | 0 |
| February | 885 | 0 |
| March | 667 | 3 |
| April | 339 | 17 |
| May | 122 | 110 |
| June | 6 | 296 |
| July | 1 | 416 |
| August | 2 | 369 |
| September | 65 | 174 |
| October | 300 | 29 |
| November | 660 | 1 |
| December | 1,038 | 0 |
| Year (annual) | 5,220 | 1,415 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00141435. 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 Chapman been warmer than normal lately?
2025 averaged 55.2°F, 0.7°F above the 1991-2020 normal of 54.5°F. 3 of the 3 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2023 | 56.4°F | +1.9°F | 27.64 | 9.8 |
| 2024 | 56.9°F | +2.4°F | 34.03 | 8.4 |
| 2025 | 55.2°F | +0.7°F | 32.28 | 28.2 |
Source: observed years: ACIS, station USC00141435. A year counts only with all twelve months complete.
How does Chapman's climate compare?
Chapman is warmer than 54 of the other 136 places with their own NOAA record in Kansas, and wetter than 76. Across the 7,247 U.S. stations with normals, its annual mean of 54.5°F is warmer than 59%.
In the Köppen classification computed from these normals, Chapman is Dfa: continental, 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.
Questions about Chapman's climate
What is the coldest month in Chapman?
January, with a normal high of 40°F and a normal low of 17°F. The warmest is July (90°F by day, 67°F at night).
Does it snow in Chapman?
Yes: 7 inches in a normal year, falling on 5 days with 0.1 inch or more, the most in January (3.1 inches).
What is the rainiest month in Chapman?
May, with 5.44 in of precipitation in a normal year; the driest is January with 0.74 in.
What plant hardiness zone is Chapman in?
The USDA's 2023 map puts Chapman in zone 6b in ZIP code 67431, the nearest ZIP area.
How late can frost come in Chapman?
In half of years the last 32°F night comes after April 17; in one year in ten it comes after April 30. Waiting until April 30 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Kansas climateThe statewide normals and every place in the state
- Milford, KS10 miles from this station, 54.7°F a year
- Abilene, KS11 miles from this station, 57.5°F a year
- Herington, KS21 miles from this station, 54.0°F a year
- Manhattan, KS22 miles from this station, 55.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made