Kirwin, Kansas climate: Normal weather by month, frost dates and records
Kirwin's normal year runs from 13°F January nights to 92°F July afternoons, with 25.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.2°C, January lows of −11°C, July highs of 33°C, 652 mm of precipitation a year.
- NOAA stationKirwin Dam
- Station IDUSC00144357
- Location39.66°N 99.12°W
- Elevation1,697 ft (517 m)
- Population129
On October 14, the normal high in Kirwin is 70°F and the normal low 38°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Kirwin.
- Jan 40° 13°
- Feb 45° 16°
- Mar 56° 25°
- Apr 66° 35°
- May 75° 48°
- Jun 87° 60°
- Jul 92° 65°
- Aug 90° 61°
- Sep 82° 52°
- Oct 69° 37°
- Nov 54° 25°
- Dec 42° 16°
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 Kirwin each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 13°F. The most precipitation falls in May (4.19 in), the least in January (0.53 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 40°F | 13°F | 26.3°F | 0.53 | – | <1 | 31 | 9 h 40 min |
| February | 45°F | 16°F | 30.1°F | 0.76 | – | <1 | 27 | 10 h 40 min |
| March | 56°F | 25°F | 40.6°F | 1.40 | – | <1 | 24 | 11 h 50 min |
| April | 66°F | 35°F | 50.8°F | 2.24 | – | 1 | 10 | 13 h 10 min |
| May | 75°F | 48°F | 61.5°F | 4.19 | – | 4 | 1 | 14 h 20 min |
| June | 87°F | 60°F | 73.5°F | 3.29 | – | 14 | <1 | 15 h |
| July | 92°F | 65°F | 78.4°F | 3.96 | – | 20 | <1 | 14 h 40 min |
| August | 90°F | 61°F | 75.5°F | 3.35 | – | 17 | <1 | 13 h 50 min |
| September | 82°F | 52°F | 66.8°F | 2.17 | – | 9 | 1 | 12 h 30 min |
| October | 69°F | 37°F | 52.9°F | 1.88 | – | 1 | 9 | 11 h 10 min |
| November | 54°F | 25°F | 39.5°F | 1.06 | – | <1 | 25 | 10 h |
| December | 42°F | 16°F | 29.1°F | 0.85 | – | <1 | 30 | 9 h 20 min |
| Year (annual) | 67°F | 38°F | 52.1°F | 25.68 | – | 67 | 158 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 4°C | −11°C | −3.2°C | 13 mm |
| February | 7°C | −9°C | −1.1°C | 19 mm |
| March | 14°C | −4°C | 4.8°C | 36 mm |
| April | 19°C | 2°C | 10.4°C | 57 mm |
| May | 24°C | 9°C | 16.4°C | 106 mm |
| June | 31°C | 15°C | 23.1°C | 84 mm |
| July | 33°C | 18°C | 25.8°C | 101 mm |
| August | 32°C | 16°C | 24.2°C | 85 mm |
| September | 28°C | 11°C | 19.3°C | 55 mm |
| October | 20°C | 3°C | 11.6°C | 48 mm |
| November | 12°C | −4°C | 4.2°C | 27 mm |
| December | 6°C | −9°C | −1.6°C | 22 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Phillipsburg (12 miles away), gets 17 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00144357; 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 Kirwin?
Normal highs sit between 65°F and 85°F in April, May, September and October.
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 USC00144357.
When is the last frost in Kirwin?
In Kirwin, the last spring frost (32°F) comes after April 30 in half of years and after May 12 in one year in ten; the first autumn frost comes before October 7 in half of years and before September 24 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 301 year in 10 after May 12; 9 in 10 after April 18
- First autumn frost, half of years before
- October 71 year in 10 before September 24; 9 in 10 before October 18
NOAA puts the median frost-free season at 159 days, and the season without a hard freeze (28°F) at 176 days.
A hard freeze (28°F) comes after April 20 in half of springs and before October 15 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Kirwin in zone 6a in ZIP code 67644, 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 USC00144357; 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 Kirwin?
In a normal year in Kirwin, 67 days a year reach 90°F (14 of them 100°F or more) and 158 nights fall to 32°F or colder.
- Days at 90°F or more
- 67a normal year
- Days at 100°F or more
- 14a normal year
- Nights at 32°F or colder
- 158a normal year
- Days that stay below freezing
- 25high of 32°F or less
The highest temperature in this station's record (since 1952) is 113°F, on July 19, 1966; the lowest is −30°F, on January 4, 1974.
The wettest calendar year on that record is 1973, with 35.82 in; the snowiest season is 1957–58, with 48.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00144357; records: ACIS (NOAA Regional Climate Centers), station USC00144357. Records use complete months only; a month missing more than three days is left out.
How sunny is Kirwin?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Kirwin, 4.6 kWh per square metre a day. July is the sunniest month (87%) and February the cloudiest (75%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 2.4 |
| February | 75% | 3.3 |
| March | 77% | 4.5 |
| April | 76% | 5.5 |
| May | 78% | 6.3 |
| June | 86% | 7.1 |
| July | 87% | 7.0 |
| August | 85% | 6.1 |
| September | 84% | 5.0 |
| October | 80% | 3.7 |
| November | 81% | 2.7 |
| December | 77% | 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 Kirwin need?
A normal year in Kirwin brings 5,904 heating degree days, 10% more than the median U.S. place (5,373), and 1,224 cooling degree days, 35% 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 3,592 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,200 | 0 |
| February | 978 | 0 |
| March | 757 | 0 |
| April | 433 | 6 |
| May | 172 | 63 |
| June | 16 | 269 |
| July | 1 | 415 |
| August | 4 | 328 |
| September | 79 | 133 |
| October | 386 | 11 |
| November | 767 | 0 |
| December | 1,113 | 0 |
| Year (annual) | 5,904 | 1,224 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00144357. 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 Kirwin been warmer than normal lately?
2025 averaged 53.9°F, 1.8°F above the 1991-2020 normal of 52.1°F. 4 of the 4 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 52.6°F | +0.5°F | 21.63 |
| 2023 | 54.0°F | +1.9°F | – |
| 2024 | 55.1°F | +3.0°F | 26.28 |
| 2025 | 53.9°F | +1.8°F | 28.23 |
Over 32 complete years from 1954 to 2025, the station's annual mean temperature rose at a fitted 1.9°F per century (+0.10°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00144357; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Kirwin's climate compare?
Kirwin is warmer than 11 of the other 136 places with their own NOAA record in Kansas, and wetter than 39. Across the 7,247 U.S. stations with normals, its annual mean of 52.1°F is warmer than 50%.
In the Köppen classification computed from these normals, Kirwin 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.
Which places near Kirwin share this climate record?
3 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.
- Kensington, KS396 people · 9 mi NE
- Agra, KS195 people · 7 mi N
- Cedar, KS13 people · 10 mi E
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 Kirwin's climate
What is the coldest month in Kirwin?
January, with a normal high of 40°F and a normal low of 13°F. The warmest is July (92°F by day, 65°F at night).
Does it snow in Kirwin?
Yes. NOAA publishes no 1991-2020 snowfall normal for Kirwin's NOAA station; the nearest record that keeps one, Phillipsburg (12 miles away), records 17 inches of snow in a normal year.
What is the rainiest month in Kirwin?
May, with 4.19 in of precipitation in a normal year; the driest is January with 0.53 in.
What plant hardiness zone is Kirwin in?
The USDA's 2023 map puts Kirwin in zone 6a in ZIP code 67644, the nearest ZIP area.
How late can frost come in Kirwin?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 12. Waiting until May 12 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Kansas climateThe statewide normals and every place in the state
- Phillipsburg, KS12 miles from this station, 53.2°F a year
- Alton, KS15 miles from this station, 53.2°F a year
- Smith Center, KS20 miles from this station, 53.1°F a year
- Webster Dam, KS24 miles from this station, 53.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made