Osawatomie, Kansas climate: Normal weather by month, frost dates and records
Osawatomie's normal year runs from 19°F January nights to 89°F July afternoons, with 38.9 inches of precipitation and 8 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.8°C, January lows of −7°C, July highs of 32°C, 988 mm of precipitation a year.
- NOAA stationOsawatomie
- Station IDUSC00146084
- Location38.50°N 94.96°W
- Elevation860 ft (262 m)
- Population4,187
On October 23, the normal high in Osawatomie is 66°F and the normal low 42°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 Osawatomie.
- Jan 40° 19°
- Feb 45° 23°
- Mar 56° 33°
- Apr 66° 43°
- May 75° 54°
- Jun 84° 64°
- Jul 89° 68°
- Aug 88° 66°
- Sep 80° 57°
- Oct 69° 45°
- Nov 55° 33°
- Dec 44° 24°
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 Osawatomie each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 19°F. The most precipitation falls in May (5.51 in), the least in January (1.14 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 40°F | 19°F | 29.3°F | 1.14 | 2.9 | 4 | <1 | 28 | 9 h 50 min |
| February | 45°F | 23°F | 34.0°F | 1.63 | 2.3 | 4 | <1 | 23 | 10 h 40 min |
| March | 56°F | 33°F | 44.3°F | 2.59 | 0.5 | 6 | <1 | 14 | 11 h 50 min |
| April | 66°F | 43°F | 54.1°F | 3.75 | 0.0 | 8 | <1 | 5 | 13 h 10 min |
| May | 75°F | 54°F | 64.5°F | 5.51 | 0.0 | 10 | 1 | <1 | 14 h 10 min |
| June | 84°F | 64°F | 74.1°F | 5.49 | 0.0 | 7 | 10 | <1 | 14 h 50 min |
| July | 89°F | 68°F | 78.8°F | 4.19 | 0.0 | 7 | 18 | <1 | 14 h 40 min |
| August | 88°F | 66°F | 77.2°F | 3.37 | 0.0 | 6 | 12 | <1 | 13 h 40 min |
| September | 80°F | 57°F | 68.7°F | 4.15 | 0.0 | 6 | 5 | <1 | 12 h 30 min |
| October | 69°F | 45°F | 56.9°F | 3.09 | 0.2 | 6 | <1 | 4 | 11 h 20 min |
| November | 55°F | 33°F | 44.0°F | 2.33 | 0.1 | 5 | <1 | 15 | 10 h 10 min |
| December | 44°F | 24°F | 33.8°F | 1.65 | 2.4 | 4 | <1 | 25 | 9 h 30 min |
| Year (annual) | 66°F | 44°F | 55.0°F | 38.89 | 8.4 | 71 | 46 | 114 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −7°C | −1.5°C | 29 mm | 7 cm |
| February | 7°C | −5°C | 1.1°C | 41 mm | 6 cm |
| March | 13°C | 0°C | 6.8°C | 66 mm | 1 cm |
| April | 19°C | 6°C | 12.3°C | 95 mm | 0 cm |
| May | 24°C | 12°C | 18.1°C | 140 mm | 0 cm |
| June | 29°C | 18°C | 23.4°C | 139 mm | 0 cm |
| July | 32°C | 20°C | 26.0°C | 106 mm | 0 cm |
| August | 31°C | 19°C | 25.1°C | 86 mm | 0 cm |
| September | 27°C | 14°C | 20.4°C | 105 mm | 0 cm |
| October | 20°C | 7°C | 13.8°C | 78 mm | 1 cm |
| November | 13°C | 1°C | 6.7°C | 59 mm | 0 cm |
| December | 7°C | −5°C | 1.0°C | 42 mm | 6 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00146084; 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 Osawatomie?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. 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 USC00146084.
When is the last frost in Osawatomie?
In Osawatomie, the last spring frost (32°F) comes after April 14 in half of years and after April 29 in one year in ten; the first autumn frost comes before October 25 in half of years and before October 11 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 141 year in 10 after April 29; 9 in 10 after March 31
- First autumn frost, half of years before
- October 251 year in 10 before October 11; 9 in 10 before November 5
NOAA puts the median frost-free season at 192 days, and the season without a hard freeze (28°F) at 212 days.
A hard freeze (28°F) comes after April 3 in half of springs and before November 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Osawatomie in zone 6b in ZIP code 66064, 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 USC00146084; 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 Osawatomie?
In a normal year in Osawatomie, 46 days a year reach 90°F (5 of them 100°F or more), 114 nights fall to 32°F or colder and 71 days bring measurable precipitation.
- Days at 90°F or more
- 46a normal year
- Days at 100°F or more
- 5a normal year
- Nights at 32°F or colder
- 114a normal year
- Days that stay below freezing
- 24high of 32°F or less
- Days with 0.01 inch of precipitation
- 71a normal year
- Days with 1 inch of snow or more
- 3a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00146084.
How sunny is Osawatomie?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Osawatomie, 4.3 kWh per square metre a day. July is the sunniest month (83%) and March the cloudiest (69%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.3 |
| February | 70% | 3.0 |
| March | 69% | 4.0 |
| April | 71% | 5.0 |
| May | 73% | 5.7 |
| June | 81% | 6.6 |
| July | 83% | 6.5 |
| August | 82% | 5.7 |
| September | 82% | 4.8 |
| October | 76% | 3.5 |
| November | 74% | 2.5 |
| December | 71% | 2.0 |
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 Osawatomie need?
A normal year in Osawatomie brings 5,016 heating degree days, 7% fewer than the median U.S. place (5,373), and 1,394 cooling degree days, 54% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,039 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,106 | 0 |
| February | 869 | 0 |
| March | 645 | 3 |
| April | 338 | 11 |
| May | 119 | 104 |
| June | 5 | 279 |
| July | 0 | 426 |
| August | 1 | 379 |
| September | 49 | 160 |
| October | 284 | 31 |
| November | 631 | 2 |
| December | 969 | 0 |
| Year (annual) | 5,016 | 1,394 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00146084. 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.
How does Osawatomie's climate compare?
Osawatomie is warmer than 71 of the other 136 places with their own NOAA record in Kansas, and wetter than 111. Across the 7,247 U.S. stations with normals, its annual mean of 55.0°F is warmer than 60%.
In the Köppen classification computed from these normals, Osawatomie 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 Osawatomie share this climate record?
4 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.
- Lane, KS243 people · 8 mi SW
- Fontana, KS231 people · 8 mi SE
- Parker, KS229 people · 12 mi S
- Rantoul, KS174 people · 8 mi NW
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 Osawatomie's climate
What is the coldest month in Osawatomie?
January, with a normal high of 40°F and a normal low of 19°F. The warmest is July (89°F by day, 68°F at night).
Does it snow in Osawatomie?
Yes: 8 inches in a normal year, falling on 3 days with 0.1 inch or more, the most in January (2.9 inches).
What is the rainiest month in Osawatomie?
May, with 5.51 in of precipitation in a normal year; the driest is January with 1.14 in.
What plant hardiness zone is Osawatomie in?
The USDA's 2023 map puts Osawatomie in zone 6b in ZIP code 66064, the nearest ZIP area.
How late can frost come in Osawatomie?
In half of years the last 32°F night comes after April 14; in one year in ten it comes after April 29. Waiting until April 29 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Kansas climateThe statewide normals and every place in the state
- Paola, KS7 miles from this station, 55.0°F a year
- Hillsdale, KS12 miles from this station, 54.8°F a year
- Ottawa, KS19 miles from this station, 54.5°F a year
- Garnett, KS21 miles from this station, 55.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made