Danville, Illinois climate: Normal weather by month, frost dates and records
Danville's normal year runs from 20°F January nights to 85°F July afternoons, with 43.2 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.7°C, January lows of −7°C, July highs of 30°C, 1,098 mm of precipitation a year.
- NOAA stationDanville
- Station IDUSC00112140
- Location40.14°N 87.65°W
- Elevation555 ft (169 m)
- From the center2 miles
- Population27,981
On October 23, the normal high in Danville is 63°F and the normal low 42°F, and the chance of measurable rain or snow is 33%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Danville.
- Jan 35° 20°
- Feb 40° 23°
- Mar 52° 32°
- Apr 65° 42°
- May 75° 52°
- Jun 83° 61°
- Jul 85° 65°
- Aug 84° 63°
- Sep 79° 56°
- Oct 67° 44°
- Nov 52° 34°
- Dec 40° 25°
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 Danville each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 20°F. The most precipitation falls in June (5.18 in), the least in February (2.24 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 35°F | 20°F | 27.4°F | 2.47 | 11 | <1 | 26 | 9 h 40 min |
| February | 40°F | 23°F | 31.7°F | 2.24 | 9 | <1 | 23 | 10 h 40 min |
| March | 52°F | 32°F | 42.1°F | 3.23 | 11 | <1 | 17 | 11 h 50 min |
| April | 65°F | 42°F | 53.7°F | 4.46 | 12 | <1 | 5 | 13 h 10 min |
| May | 75°F | 52°F | 63.8°F | 4.63 | 13 | 1 | <1 | 14 h 20 min |
| June | 83°F | 61°F | 72.2°F | 5.18 | 12 | 5 | <1 | 15 h |
| July | 85°F | 65°F | 75.1°F | 4.34 | 10 | 7 | <1 | 14 h 50 min |
| August | 84°F | 63°F | 73.5°F | 3.31 | 9 | 4 | <1 | 13 h 50 min |
| September | 79°F | 56°F | 67.3°F | 3.26 | 9 | 2 | <1 | 12 h 30 min |
| October | 67°F | 44°F | 55.4°F | 3.66 | 10 | <1 | 3 | 11 h 10 min |
| November | 52°F | 34°F | 42.8°F | 3.70 | 10 | <1 | 14 | 10 h |
| December | 40°F | 25°F | 32.4°F | 2.73 | 11 | <1 | 24 | 9 h 20 min |
| Year (annual) | 63°F | 43°F | 53.1°F | 43.21 | 126 | 19 | 112 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 2°C | −7°C | −2.6°C | 63 mm |
| February | 5°C | −5°C | −0.2°C | 57 mm |
| March | 11°C | 0°C | 5.6°C | 82 mm |
| April | 18°C | 6°C | 12.1°C | 113 mm |
| May | 24°C | 11°C | 17.7°C | 118 mm |
| June | 28°C | 16°C | 22.3°C | 132 mm |
| July | 30°C | 18°C | 23.9°C | 110 mm |
| August | 29°C | 17°C | 23.1°C | 84 mm |
| September | 26°C | 13°C | 19.6°C | 83 mm |
| October | 19°C | 7°C | 13.0°C | 93 mm |
| November | 11°C | 1°C | 6.0°C | 94 mm |
| December | 4°C | −4°C | 0.2°C | 69 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Perrysville (9 miles away), gets 19 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00112140; 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 Danville?
Normal highs sit between 65°F and 85°F in April, May, June, August, September and October. 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 USC00112140.
When is the last frost in Danville?
In Danville, the last spring frost (32°F) comes after April 21 in half of years and after May 7 in one year in ten; the first autumn frost comes before October 20 in half of years and before October 6 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 7; 9 in 10 after April 6
- First autumn frost, half of years before
- October 201 year in 10 before October 6; 9 in 10 before November 1
NOAA puts the median frost-free season at 181 days, and the season without a hard freeze (28°F) at 205 days.
A hard freeze (28°F) comes after April 8 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Danville in zone 6a in ZIP code 61832. By the map's own method, the average of each year's coldest night over 1991-2020, Danville's NOAA station is in zone 6a: the coldest night of a typical year reaches −8°F (30 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 USC00112140; 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 Danville?
In a normal year in Danville, 19 days a year reach 90°F, 112 nights fall to 32°F or colder and 126 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
- 112a normal year
- Days that stay below freezing
- 31high of 32°F or less
- Days with 0.01 inch of precipitation
- 126a normal year
The highest temperature in this station's record (since 1895) is 112°F, on July 14, 1936; the lowest is −26°F, on January 17, 1982.
The wettest calendar year on that record is 2008, with 54.32 in; the snowiest season is 1942–43, with 45.4 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00112140; records: ACIS (NOAA Regional Climate Centers), station USC00112140. Records use complete months only; a month missing more than three days is left out.
How sunny is Danville?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Danville, 4.0 kWh per square metre a day. July is the sunniest month (81%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 62% | 1.8 |
| February | 66% | 2.7 |
| March | 67% | 3.6 |
| April | 70% | 4.8 |
| May | 72% | 5.5 |
| June | 79% | 6.3 |
| July | 81% | 6.3 |
| August | 81% | 5.6 |
| September | 80% | 4.6 |
| October | 72% | 3.1 |
| November | 69% | 2.1 |
| December | 60% | 1.5 |
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 Danville need?
A normal year in Danville brings 5,366 heating degree days, 0% fewer than the median U.S. place (5,373), and 1,066 cooling degree days, 17% 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 3,633 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,165 | 0 |
| February | 934 | 0 |
| March | 714 | 2 |
| April | 352 | 14 |
| May | 126 | 88 |
| June | 14 | 230 |
| July | 1 | 314 |
| August | 3 | 265 |
| September | 62 | 130 |
| October | 319 | 21 |
| November | 665 | 1 |
| December | 1,010 | 0 |
| Year (annual) | 5,366 | 1,066 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00112140. 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 Danville been warmer than normal lately?
2025 averaged 53.9°F, 0.8°F above the 1991-2020 normal of 53.1°F. 3 of the 3 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 54.1°F | +1.0°F | 32.53 |
| 2024 | 55.8°F | +2.6°F | 42.16 |
| 2025 | 53.9°F | +0.8°F | 30.36 |
Over 98 complete years from 1901 to 2025, the station's annual mean temperature rose at a fitted 1.0°F per century (+0.06°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00112140; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Danville's climate compare?
Danville is warmer than 96 of the other 143 places with their own NOAA record in Illinois, and wetter than 110. Across the 7,247 U.S. stations with normals, its annual mean of 53.1°F is warmer than 54%.
In the Köppen classification computed from these normals, Danville 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 Danville share this climate record?
13 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.
- Covington, IN2,751 people · 14 mi E
- Veedersburg, IN2,096 people · 21 mi E
- Cayuga, IN954 people · 16 mi SE
- West Lebanon, IN684 people · 17 mi NE
- Kingman, IN565 people · 23 mi SE
- Lake Holiday Hideaway, IN445 people · 21 mi SE
- Newport, IN412 people · 22 mi SE
- Eugene, IN172 people · 15 mi SE
- Foster, IN128 people · 9 mi E
- State Line City, IN123 people · 8 mi NE
- Hedrick, IN116 people · 14 mi NE
- Cates, IN110 people · 19 mi SE
- Marshfield, IN84 people · 13 mi NE
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 Danville's climate
What is the coldest month in Danville?
January, with a normal high of 35°F and a normal low of 20°F. The warmest is July (85°F by day, 65°F at night).
Does it snow in Danville?
Yes. NOAA publishes no 1991-2020 snowfall normal for Danville's NOAA station; the nearest record that keeps one, Perrysville (9 miles away), records 19 inches of snow in a normal year.
What is the rainiest month in Danville?
June, with 5.18 in of precipitation in a normal year; the driest is February with 2.24 in.
What plant hardiness zone is Danville in?
The USDA's 2023 map puts Danville in zone 6a in ZIP code 61832. By the same method at Danville's NOAA station, the coldest night of a typical year reaches −8°F (30 years, 1991-2020): zone 6a.
How late can frost come in Danville?
In half of years the last 32°F night comes after April 21; in one year in ten it comes after May 7. Waiting until May 7 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Illinois climateThe statewide normals and every place in the state
- Perrysville, IN9 miles from this station, 52.2°F a year
- Sidell, IL15 miles from this station, 51.5°F a year
- Ogden, IL16 miles from this station, 52.2°F a year
- Hoopeston, IL23 miles from this station, 52.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made