Paris, Illinois climate: Normal weather by month, frost dates and records
Paris's normal year runs from 17°F January nights to 84°F July afternoons, with 42.7 inches of precipitation and 19 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.8°C, January lows of −9°C, July highs of 29°C, 1,086 mm of precipitation a year.
- NOAA stationParis Stp
- Station IDUSC00116610
- Location39.62°N 87.67°W
- Elevation649 ft (198 m)
- From the center1 miles
- Population8,078
On October 14, the normal high in Paris is 67°F and the normal low 43°F, and the chance of measurable rain or snow is 28%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Paris.
- Jan 34° 17°
- Feb 39° 20°
- Mar 50° 29°
- Apr 63° 40°
- May 73° 51°
- Jun 82° 61°
- Jul 84° 64°
- Aug 83° 62°
- Sep 78° 54°
- Oct 66° 43°
- Nov 51° 31°
- Dec 39° 23°
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 Paris 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 June (5.02 in), the least in February (2.33 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 34°F | 17°F | 25.3°F | 2.81 | 8.6 | 10 | <1 | 27 | 9 h 40 min |
| February | 39°F | 20°F | 29.3°F | 2.33 | 3.6 | 9 | <1 | 23 | 10 h 40 min |
| March | 50°F | 29°F | 39.5°F | 3.00 | 2.0 | 10 | <1 | 18 | 11 h 50 min |
| April | 63°F | 40°F | 51.4°F | 4.94 | 0.3 | 11 | <1 | 5 | 13 h 10 min |
| May | 73°F | 51°F | 62.1°F | 4.17 | 0.0 | 12 | <1 | <1 | 14 h 20 min |
| June | 82°F | 61°F | 71.2°F | 5.02 | 0.0 | 10 | 4 | <1 | 15 h |
| July | 84°F | 64°F | 74.1°F | 3.83 | 0.0 | 9 | 7 | <1 | 14 h 40 min |
| August | 83°F | 62°F | 72.3°F | 3.57 | 0.0 | 8 | 5 | <1 | 13 h 50 min |
| September | 78°F | 54°F | 65.8°F | 2.94 | 0.0 | 7 | 3 | <1 | 12 h 30 min |
| October | 66°F | 43°F | 54.1°F | 3.62 | 0.0 | 9 | <1 | 3 | 11 h 10 min |
| November | 51°F | 31°F | 41.0°F | 3.66 | 0.6 | 9 | <1 | 15 | 10 h |
| December | 39°F | 23°F | 30.6°F | 2.85 | 4.0 | 10 | <1 | 25 | 9 h 20 min |
| Year (annual) | 62°F | 41°F | 51.4°F | 42.74 | 19.1 | 112 | 19 | 116 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −9°C | −3.7°C | 71 mm | 22 cm |
| February | 4°C | −7°C | −1.5°C | 59 mm | 9 cm |
| March | 10°C | −2°C | 4.2°C | 76 mm | 5 cm |
| April | 17°C | 4°C | 10.8°C | 125 mm | 1 cm |
| May | 23°C | 11°C | 16.7°C | 106 mm | 0 cm |
| June | 28°C | 16°C | 21.8°C | 128 mm | 0 cm |
| July | 29°C | 18°C | 23.4°C | 97 mm | 0 cm |
| August | 28°C | 17°C | 22.4°C | 91 mm | 0 cm |
| September | 25°C | 12°C | 18.8°C | 75 mm | 0 cm |
| October | 19°C | 6°C | 12.3°C | 92 mm | 0 cm |
| November | 10°C | 0°C | 5.0°C | 93 mm | 2 cm |
| December | 4°C | −5°C | −0.8°C | 72 mm | 10 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00116610; 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 Paris?
Normal highs sit between 65°F and 85°F in May, June, July, August, September and October. Of those, September has the fewest days with rain (7).
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 USC00116610.
When is the last frost in Paris?
In Paris, the last spring frost (32°F) comes after April 21 in half of years and after May 9 in one year in ten; the first autumn frost comes before October 20 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 211 year in 10 after May 9; 9 in 10 after April 6
- First autumn frost, half of years before
- October 201 year in 10 before October 1; 9 in 10 before November 1
NOAA puts the median frost-free season at 179 days, and the season without a hard freeze (28°F) at 202 days.
A hard freeze (28°F) comes after April 9 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Paris in zone 6a in ZIP code 61944, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Paris's NOAA station is in zone 6a: the coldest night of a typical year reaches −7°F (29 complete years).
Frost dates for every NOAA station in Illinois · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00116610; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Paris?
In a normal year in Paris, 19 days a year reach 90°F, 116 nights fall to 32°F or colder and 112 days bring measurable precipitation.
- Days at 90°F or more
- 19a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 116a normal year
- Days that stay below freezing
- 33high of 32°F or less
- Days with 0.01 inch of precipitation
- 112a normal year
- Days with 1 inch of snow or more
- 8a normal year
The highest temperature in this station's record (since 1893) is 109°F, on July 14, 1936; the lowest is −23°F, on January 18, 1930.
The wettest calendar year on that record is 1993, with 57.16 in; the snowiest season is 1977–78, with 71.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00116610; records: ACIS (NOAA Regional Climate Centers), station USC00116610. Records use complete months only; a month missing more than three days is left out.
How sunny is Paris?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Paris, 4.0 kWh per square metre a day. August is the sunniest month (82%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 61% | 1.8 |
| February | 64% | 2.6 |
| March | 67% | 3.7 |
| April | 71% | 4.9 |
| May | 73% | 5.5 |
| June | 80% | 6.3 |
| July | 81% | 6.2 |
| August | 82% | 5.6 |
| September | 81% | 4.7 |
| October | 74% | 3.3 |
| November | 70% | 2.2 |
| December | 60% | 1.6 |
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 Paris need?
A normal year in Paris brings 5,853 heating degree days, 9% more than the median U.S. place (5,373), and 928 cooling degree days, 2% 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 3,354 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,230 | 0 |
| February | 998 | 0 |
| March | 792 | 1 |
| April | 417 | 9 |
| May | 160 | 70 |
| June | 21 | 206 |
| July | 3 | 285 |
| August | 7 | 235 |
| September | 83 | 105 |
| October | 357 | 17 |
| November | 721 | 1 |
| December | 1,065 | 0 |
| Year (annual) | 5,853 | 928 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00116610. 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 Paris been warmer than normal lately?
2024 averaged 55.0°F, 3.6°F above the 1991-2020 normal of 51.4°F. 3 of the 3 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 51.9°F | +0.5°F | 35.63 | 8.8 |
| 2023 | 54.4°F | +3.0°F | 34.41 | 5.2 |
| 2024 | 55.0°F | +3.6°F | 38.30 | 6.1 |
Over 83 complete years from 1901 to 2024, the station's annual mean temperature rose at a fitted 2.1°F per century (+0.12°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00116610; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Paris's climate compare?
Paris is warmer than 64 of the other 143 places with their own NOAA record in Illinois, and wetter than 108. Across the 7,247 U.S. stations with normals, its annual mean of 51.4°F is warmer than 47%.
In the Köppen classification computed from these normals, Paris 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 Paris share this climate record?
18 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.
- Clinton, IN4,802 people · 14 mi E
- West Terre Haute, IN2,153 people · 16 mi SE
- Fairview Park, IN1,417 people · 14 mi E
- Tecumseh, IN870 people · 13 mi E
- St. Mary of the Woods, IN869 people · 13 mi SE
- New Goshen, IN649 people · 11 mi E
- St. Bernice, IN585 people · 10 mi NE
- Lyford, IN557 people · 16 mi E
- Dana, IN552 people · 16 mi NE
- Universal, IN284 people · 11 mi E
- Brocton, IL263 people · 16 mi NW
- Vermilion, IL194 people · 5 mi SE
- Blanford, IN154 people · 9 mi NE
- Redmon, IL134 people · 11 mi W
- Shepardsville, IN86 people · 13 mi E
- Libertyville, IN77 people · 8 mi E
- Centenary, IN74 people · 11 mi E
- Toad Hop, IN42 people · 15 mi SE
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 Paris's climate
What is the coldest month in Paris?
January, with a normal high of 34°F and a normal low of 17°F. The warmest is July (84°F by day, 64°F at night).
Does it snow in Paris?
Yes: 19 inches in a normal year, falling on 13 days with 0.1 inch or more, the most in January (8.6 inches).
What is the rainiest month in Paris?
June, with 5.02 in of precipitation in a normal year; the driest is February with 2.33 in.
What plant hardiness zone is Paris in?
The USDA's 2023 map puts Paris in zone 6a in ZIP code 61944, the nearest ZIP area. By the same method at Paris's NOAA station, the coldest night of a typical year reaches −7°F (29 years, 1991-2020): zone 6a.
How late can frost come in Paris?
In half of years the last 32°F night comes after April 21; in one year in ten it comes after May 9. Waiting until May 9 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Illinois climateThe statewide normals and every place in the state
- Terre Haute, IN22 miles from this station, 53.5°F a year
- Rockville, IN25 miles from this station, 52.0°F a year
- Sidell, IL25 miles from this station, 51.5°F a year
- Casey, IL27 miles from this station, 54.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made