Warsaw, Indiana climate: Normal weather by month, frost dates and records
Warsaw's normal year runs from 17°F January nights to 84°F July afternoons, with 40.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.0°C, January lows of −9°C, July highs of 29°C, 1,030 mm of precipitation a year.
- NOAA stationWarsaw
- Station IDUSC00129240
- Location41.26°N 85.87°W
- Elevation815 ft (248 m)
- Population16,111
On October 23, the normal high in Warsaw is 60°F and the normal low 39°F, and the chance of measurable rain or snow is 35%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Warsaw.
- Jan 33° 17°
- Feb 37° 19°
- Mar 48° 28°
- Apr 61° 38°
- May 72° 49°
- Jun 81° 58°
- Jul 84° 62°
- Aug 82° 60°
- Sep 76° 52°
- Oct 64° 42°
- Nov 50° 31°
- Dec 38° 22°
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 Warsaw each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 17°F. The most precipitation falls in May (4.89 in), the least in February (1.98 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 33°F | 17°F | 24.8°F | 2.59 | 12 | <1 | 28 | 9 h 30 min |
| February | 37°F | 19°F | 27.9°F | 1.98 | 8 | <1 | 25 | 10 h 40 min |
| March | 48°F | 28°F | 37.7°F | 2.16 | 9 | <1 | 22 | 11 h 50 min |
| April | 61°F | 38°F | 49.4°F | 4.05 | 12 | <1 | 8 | 13 h 20 min |
| May | 72°F | 49°F | 60.2°F | 4.89 | 13 | 1 | 1 | 14 h 30 min |
| June | 81°F | 58°F | 69.5°F | 4.72 | 12 | 3 | <1 | 15 h 10 min |
| July | 84°F | 62°F | 72.8°F | 4.41 | 9 | 5 | <1 | 14 h 50 min |
| August | 82°F | 60°F | 70.8°F | 4.52 | 9 | 2 | <1 | 13 h 50 min |
| September | 76°F | 52°F | 64.3°F | 2.90 | 9 | 2 | <1 | 12 h 30 min |
| October | 64°F | 42°F | 52.6°F | 3.17 | 11 | <1 | 5 | 11 h 10 min |
| November | 50°F | 31°F | 40.6°F | 2.71 | 11 | <1 | 17 | 9 h 50 min |
| December | 38°F | 22°F | 30.0°F | 2.44 | 11 | <1 | 26 | 9 h 10 min |
| Year (annual) | 60°F | 40°F | 50.0°F | 40.54 | 125 | 12 | 132 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 1°C | −9°C | −4.0°C | 66 mm |
| February | 3°C | −7°C | −2.3°C | 50 mm |
| March | 9°C | −2°C | 3.2°C | 55 mm |
| April | 16°C | 3°C | 9.7°C | 103 mm |
| May | 22°C | 9°C | 15.7°C | 124 mm |
| June | 27°C | 15°C | 20.8°C | 120 mm |
| July | 29°C | 17°C | 22.7°C | 112 mm |
| August | 28°C | 15°C | 21.6°C | 115 mm |
| September | 25°C | 11°C | 17.9°C | 74 mm |
| October | 18°C | 5°C | 11.4°C | 81 mm |
| November | 10°C | 0°C | 4.8°C | 69 mm |
| December | 3°C | −5°C | −1.1°C | 62 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Northern Indiana Weather Office (11 miles away), gets 47 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00129240; 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 Warsaw?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (9).
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 USC00129240.
When is the last frost in Warsaw?
In Warsaw, the last spring frost (32°F) comes after April 28 in half of years and after May 14 in one year in ten; the first autumn frost comes before October 18 in half of years and before October 1 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 281 year in 10 after May 14; 9 in 10 after April 13
- First autumn frost, half of years before
- October 181 year in 10 before October 1; 9 in 10 before October 30
NOAA puts the median frost-free season at 170 days, and the season without a hard freeze (28°F) at 195 days.
A hard freeze (28°F) comes after April 16 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Warsaw in zone 6a in ZIP code 46580.
Frost dates for every NOAA station in Indiana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00129240; 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 Warsaw?
In a normal year in Warsaw, 12 days a year reach 90°F, 132 nights fall to 32°F or colder and 125 days bring measurable precipitation.
- Days at 90°F or more
- 12a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 132a normal year
- Days that stay below freezing
- 43high of 32°F or less
- Days with 0.01 inch of precipitation
- 125a normal year
The highest temperature in this station's record (since 1896) is 103°F, on July 14, 1976; the lowest is −25°F, on January 16, 1972.
The wettest calendar year on that record is 1990, with 50.99 in; the snowiest season is 2007–08, with 56.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00129240; records: ACIS (NOAA Regional Climate Centers), station USC00129240. Records use complete months only; a month missing more than three days is left out.
How sunny is Warsaw?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Warsaw, 3.8 kWh per square metre a day. July is the sunniest month (81%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 55% | 1.5 |
| February | 60% | 2.4 |
| March | 65% | 3.5 |
| April | 69% | 4.7 |
| May | 71% | 5.4 |
| June | 77% | 6.1 |
| July | 81% | 6.2 |
| August | 80% | 5.4 |
| September | 78% | 4.4 |
| October | 69% | 2.9 |
| November | 63% | 1.9 |
| December | 55% | 1.3 |
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 Warsaw need?
A normal year in Warsaw brings 6,178 heating degree days, 15% more than the median U.S. place (5,373), and 761 cooling degree days, 16% fewer 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 3,023 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,246 | 0 |
| February | 1,040 | 0 |
| March | 848 | 2 |
| April | 475 | 7 |
| May | 203 | 54 |
| June | 33 | 168 |
| July | 6 | 246 |
| August | 11 | 191 |
| September | 105 | 84 |
| October | 395 | 10 |
| November | 732 | 0 |
| December | 1,085 | 0 |
| Year (annual) | 6,178 | 761 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00129240. 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 Warsaw been warmer than normal lately?
2025 averaged 50.6°F, 0.6°F above the 1991-2020 normal of 50.0°F. 3 of the 3 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 52.1°F | +2.1°F | 37.02 |
| 2024 | 53.4°F | +3.4°F | 40.21 |
| 2025 | 50.6°F | +0.6°F | 32.49 |
Over 41 complete years from 1949 to 2025, the station's annual mean temperature rose at a fitted 4.1°F per century (+0.23°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00129240; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Warsaw's climate compare?
Warsaw is warmer than 15 of the other 98 places with their own NOAA record in Indiana, and wetter than 26. Across the 7,247 U.S. stations with normals, its annual mean of 50.0°F is warmer than 40%.
In the Köppen classification computed from these normals, Warsaw 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 Warsaw share this climate record?
10 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.
- Winona Lake, IN5,107 people · 4 mi SE
- Pierceton, IN931 people · 10 mi SE
- Mentone, IN925 people · 11 mi SW
- Palestine, IN925 people · 7 mi SW
- Etna Green, IN578 people · 9 mi W
- Leesburg, IN550 people · 5 mi N
- Claypool, IN395 people · 9 mi S
- Hoffman Lake, IN336 people · 6 mi W
- Wooster, IN168 people · 8 mi SE
- Burket, IN125 people · 9 mi SW
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 Warsaw's climate
What is the coldest month in Warsaw?
January, with a normal high of 33°F and a normal low of 17°F. The warmest is July (84°F by day, 62°F at night).
Does it snow in Warsaw?
Yes. NOAA publishes no 1991-2020 snowfall normal for Warsaw's NOAA station; the nearest record that keeps one, Northern Indiana Weather Office (11 miles away), records 47 inches of snow in a normal year.
What is the rainiest month in Warsaw?
May, with 4.89 in of precipitation in a normal year; the driest is February with 1.98 in.
What plant hardiness zone is Warsaw in?
The USDA's 2023 map puts Warsaw in zone 6a in ZIP code 46580.
How late can frost come in Warsaw?
In half of years the last 32°F night comes after April 28; in one year in ten it comes after May 14. Waiting until May 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Indiana climateThe statewide normals and every place in the state
- Northern Indiana Weather Office, IN11 miles from this station, 50.1°F a year
- Goshen, IN19 miles from this station, 50.1°F a year
- North Manchester, IN19 miles from this station, 49.9°F a year
- Columbia City, IN21 miles from this station, 49.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made