Princeville, Illinois climate: Normal weather by month, frost dates and records
Princeville's normal year runs from 15°F January nights to 86°F July afternoons, with 38.8 inches of precipitation and 20 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.4°C, January lows of −10°C, July highs of 30°C, 986 mm of precipitation a year.
- NOAA stationPrinceville
- Station IDUSC00117004
- Location40.93°N 89.76°W
- Elevation750 ft (229 m)
- From the centerunder 1 mile
- Population1,719
On October 23, the normal high in Princeville is 62°F and the normal low 39°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Princeville.
- Jan 33° 15°
- Feb 37° 18°
- Mar 50° 28°
- Apr 64° 39°
- May 75° 51°
- Jun 83° 61°
- Jul 86° 63°
- Aug 84° 61°
- Sep 78° 52°
- Oct 65° 41°
- Nov 51° 30°
- Dec 37° 20°
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 Princeville each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 15°F. The most precipitation falls in May (5.05 in), the least in February (1.90 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 33°F | 15°F | 23.5°F | 2.18 | 5.4 | 8 | <1 | 29 | 9 h 30 min |
| February | 37°F | 18°F | 27.8°F | 1.90 | 5.5 | 7 | <1 | 26 | 10 h 40 min |
| March | 50°F | 28°F | 39.1°F | 2.42 | 2.0 | 9 | <1 | 23 | 11 h 50 min |
| April | 64°F | 39°F | 51.0°F | 3.67 | 0.1 | 11 | <1 | 9 | 13 h 20 min |
| May | 75°F | 51°F | 62.5°F | 5.05 | 0.0 | 12 | 1 | 1 | 14 h 30 min |
| June | 83°F | 61°F | 71.7°F | 4.00 | 0.0 | 11 | 5 | <1 | 15 h 10 min |
| July | 86°F | 63°F | 74.4°F | 4.48 | 0.0 | 9 | 8 | <1 | 14 h 50 min |
| August | 84°F | 61°F | 72.3°F | 3.70 | 0.0 | 9 | 6 | <1 | 13 h 50 min |
| September | 78°F | 52°F | 65.2°F | 3.86 | 0.0 | 8 | 2 | 1 | 12 h 30 min |
| October | 65°F | 41°F | 53.1°F | 3.11 | 0.0 | 9 | <1 | 8 | 11 h 10 min |
| November | 51°F | 30°F | 40.4°F | 2.40 | 0.9 | 8 | <1 | 19 | 10 h |
| December | 37°F | 20°F | 28.6°F | 2.05 | 6.4 | 7 | <1 | 28 | 9 h 20 min |
| Year (annual) | 62°F | 40°F | 50.8°F | 38.82 | 20.3 | 107 | 23 | 143 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −10°C | −4.7°C | 55 mm | 14 cm |
| February | 3°C | −8°C | −2.3°C | 48 mm | 14 cm |
| March | 10°C | −2°C | 3.9°C | 61 mm | 5 cm |
| April | 18°C | 4°C | 10.6°C | 93 mm | 0 cm |
| May | 24°C | 10°C | 16.9°C | 128 mm | 0 cm |
| June | 28°C | 16°C | 22.1°C | 102 mm | 0 cm |
| July | 30°C | 17°C | 23.6°C | 114 mm | 0 cm |
| August | 29°C | 16°C | 22.4°C | 94 mm | 0 cm |
| September | 26°C | 11°C | 18.4°C | 98 mm | 0 cm |
| October | 19°C | 5°C | 11.7°C | 79 mm | 0 cm |
| November | 10°C | −1°C | 4.7°C | 61 mm | 2 cm |
| December | 3°C | −7°C | −1.9°C | 52 mm | 16 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00117004; 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 Princeville?
Normal highs sit between 65°F and 85°F in May, June, August, September and October. Of those, September has the fewest days with rain (8).
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 USC00117004.
When is the last frost in Princeville?
In Princeville, the last spring frost (32°F) comes after April 22 in half of years and after May 6 in one year in ten; the first autumn frost comes before October 14 in half of years and before September 29 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 221 year in 10 after May 6; 9 in 10 after April 8
- First autumn frost, half of years before
- October 141 year in 10 before September 29; 9 in 10 before October 27
NOAA puts the median frost-free season at 174 days, and the season without a hard freeze (28°F) at 197 days.
A hard freeze (28°F) comes after April 12 in half of springs and before October 26 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Princeville in zone 5b in ZIP code 61559, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Princeville's NOAA station is in zone 5b: the coldest night of a typical year reaches −12°F (17 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 USC00117004; 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 Princeville?
In a normal year in Princeville, 23 days a year reach 90°F, 143 nights fall to 32°F or colder and 107 days bring measurable precipitation.
- Days at 90°F or more
- 23a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 143a normal year
- Days that stay below freezing
- 40high of 32°F or less
- Days with 0.01 inch of precipitation
- 107a normal year
- Days with 1 inch of snow or more
- 7a normal year
The highest temperature in this station's record (since 1905) is 105°F, on August 2, 1988; the lowest is −27°F, on February 13, 1905.
The wettest calendar year on that record is 2009, with 50.45 in; the snowiest season is 1956–57, with 44.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00117004; records: ACIS (NOAA Regional Climate Centers), station USC00117004. Records use complete months only; a month missing more than three days is left out.
How sunny is Princeville?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Princeville, 4.1 kWh per square metre a day. July is the sunniest month (83%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 64% | 1.9 |
| February | 67% | 2.8 |
| March | 68% | 3.7 |
| April | 71% | 4.9 |
| May | 72% | 5.6 |
| June | 79% | 6.3 |
| July | 83% | 6.4 |
| August | 81% | 5.6 |
| September | 81% | 4.7 |
| October | 73% | 3.2 |
| November | 70% | 2.2 |
| December | 62% | 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 Princeville need?
A normal year in Princeville brings 6,102 heating degree days, 14% more than the median U.S. place (5,373), and 964 cooling degree days, 6% 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 3,345 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,286 | 0 |
| February | 1,042 | 0 |
| March | 805 | 2 |
| April | 432 | 12 |
| May | 155 | 79 |
| June | 22 | 223 |
| July | 4 | 294 |
| August | 10 | 236 |
| September | 98 | 103 |
| October | 382 | 15 |
| November | 739 | 1 |
| December | 1,127 | 0 |
| Year (annual) | 6,102 | 964 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00117004. 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 Princeville's climate compare?
Princeville is warmer than 49 of the other 143 places with their own NOAA record in Illinois, and wetter than 50. Across the 7,247 U.S. stations with normals, its annual mean of 50.8°F is warmer than 44%.
In the Köppen classification computed from these normals, Princeville 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 Princeville share this climate record?
5 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.
- Elmwood, IL2,041 people · 15 mi SW
- Dunlap, IL1,596 people · 7 mi SE
- Wyoming, IL1,269 people · 9 mi N
- Brimfield, IL770 people · 9 mi SW
- Williamsfield, IL557 people · 14 mi W
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 Princeville's climate
What is the coldest month in Princeville?
January, with a normal high of 33°F and a normal low of 15°F. The warmest is July (86°F by day, 63°F at night).
Does it snow in Princeville?
Yes: 20 inches in a normal year, falling on 14 days with 0.1 inch or more, the most in December (6.4 inches).
What is the rainiest month in Princeville?
May, with 5.05 in of precipitation in a normal year; the driest is February with 1.90 in.
What plant hardiness zone is Princeville in?
The USDA's 2023 map puts Princeville in zone 5b in ZIP code 61559, the nearest ZIP area. By the same method at Princeville's NOAA station, the coldest night of a typical year reaches −12°F (17 years, 1991-2020): zone 5b.
How late can frost come in Princeville?
In half of years the last 32°F night comes after April 22; in one year in ten it comes after May 6. Waiting until May 6 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Illinois climateThe statewide normals and every place in the state
- Peoria, IL19 miles from this station, 52.7°F a year
- Lacon, IL19 miles from this station, 52.6°F a year
- Galva, IL22 miles from this station, 49.5°F a year
- Kewanee, IL23 miles from this station, 49.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made