Neoga, Illinois climate: Normal weather by month, frost dates and records
Neoga's normal year runs from 19°F January nights to 87°F July afternoons, with 41.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.0°C, January lows of −7°C, July highs of 31°C, 1,064 mm of precipitation a year.
- NOAA stationNeoga (4 mi NW)
- Station IDUSC00116025
- Location39.35°N 88.50°W
- Elevation643 ft (196 m)
- From the center3 miles
- Population1,383
On October 23, the normal high in Neoga is 65°F and the normal low 41°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 Neoga.
- Jan 37° 19°
- Feb 42° 23°
- Mar 53° 32°
- Apr 65° 42°
- May 75° 54°
- Jun 84° 63°
- Jul 87° 65°
- Aug 86° 62°
- Sep 81° 54°
- Oct 69° 43°
- Nov 54° 33°
- Dec 42° 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 Neoga each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 19°F. The most precipitation falls in June (4.75 in), the least in February (2.11 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 37°F | 19°F | 27.9°F | 2.66 | 9 | <1 | 27 | 9 h 40 min |
| February | 42°F | 23°F | 32.4°F | 2.11 | 10 | <1 | 25 | 10 h 40 min |
| March | 53°F | 32°F | 42.1°F | 2.65 | 11 | <1 | 18 | 11 h 50 min |
| April | 65°F | 42°F | 53.4°F | 4.67 | 12 | <1 | 6 | 13 h 10 min |
| May | 75°F | 54°F | 64.4°F | 4.68 | 13 | 2 | <1 | 14 h 20 min |
| June | 84°F | 63°F | 73.5°F | 4.75 | 11 | 9 | <1 | 15 h |
| July | 87°F | 65°F | 76.0°F | 4.48 | 9 | 12 | <1 | 14 h 40 min |
| August | 86°F | 62°F | 74.0°F | 3.11 | 7 | 10 | <1 | 13 h 50 min |
| September | 81°F | 54°F | 67.5°F | 2.93 | 9 | 6 | <1 | 12 h 30 min |
| October | 69°F | 43°F | 56.0°F | 3.21 | 9 | 1 | 5 | 11 h 10 min |
| November | 54°F | 33°F | 43.3°F | 3.82 | 9 | <1 | 17 | 10 h |
| December | 42°F | 25°F | 33.3°F | 2.82 | 10 | <1 | 24 | 9 h 30 min |
| Year (annual) | 65°F | 43°F | 53.6°F | 41.89 | 117 | 39 | 122 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 3°C | −7°C | −2.3°C | 68 mm |
| February | 6°C | −5°C | 0.2°C | 54 mm |
| March | 11°C | 0°C | 5.6°C | 67 mm |
| April | 19°C | 5°C | 11.9°C | 119 mm |
| May | 24°C | 12°C | 18.0°C | 119 mm |
| June | 29°C | 17°C | 23.1°C | 121 mm |
| July | 31°C | 18°C | 24.4°C | 114 mm |
| August | 30°C | 17°C | 23.3°C | 79 mm |
| September | 27°C | 12°C | 19.7°C | 74 mm |
| October | 21°C | 6°C | 13.3°C | 82 mm |
| November | 12°C | 0°C | 6.3°C | 97 mm |
| December | 5°C | −4°C | 0.7°C | 72 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Windsor (8 miles away), gets 14 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00116025; 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 Neoga?
Normal highs sit between 65°F and 85°F in April, May, June, 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 USC00116025.
When is the last frost in Neoga?
In Neoga, the last spring frost (32°F) comes after April 16 in half of years and after April 29 in one year in ten; the first autumn frost comes before October 20 in half of years and before October 4 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 161 year in 10 after April 29; 9 in 10 after April 3
- First autumn frost, half of years before
- October 201 year in 10 before October 4; 9 in 10 before November 1
NOAA puts the median frost-free season at 185 days, and the season without a hard freeze (28°F) at 207 days.
A hard freeze (28°F) comes after April 4 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Neoga in zone 6b in ZIP code 62447, the nearest ZIP area.
Frost dates for every NOAA station in Illinois · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00116025; 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 Neoga?
In a normal year in Neoga, 39 days a year reach 90°F (1 of them 100°F or more), 122 nights fall to 32°F or colder and 117 days bring measurable precipitation.
- Days at 90°F or more
- 39a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 122a normal year
- Days that stay below freezing
- 26high of 32°F or less
- Days with 0.01 inch of precipitation
- 117a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00116025.
How sunny is Neoga?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Neoga, 4.1 kWh per square metre a day. July is the sunniest month (83%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 62% | 1.9 |
| February | 65% | 2.7 |
| March | 67% | 3.7 |
| April | 72% | 4.9 |
| May | 73% | 5.5 |
| June | 81% | 6.4 |
| July | 83% | 6.3 |
| August | 82% | 5.6 |
| September | 81% | 4.7 |
| October | 74% | 3.3 |
| November | 70% | 2.3 |
| December | 61% | 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 Neoga need?
A normal year in Neoga brings 5,272 heating degree days, 2% fewer than the median U.S. place (5,373), and 1,168 cooling degree days, 29% 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 3,752 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,149 | 0 |
| February | 914 | 0 |
| March | 713 | 3 |
| April | 359 | 11 |
| May | 117 | 99 |
| June | 7 | 262 |
| July | 1 | 342 |
| August | 4 | 283 |
| September | 63 | 138 |
| October | 310 | 31 |
| November | 653 | 1 |
| December | 981 | 0 |
| Year (annual) | 5,272 | 1,168 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00116025. 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 Neoga's climate compare?
Neoga is warmer than 102 of the other 143 places with their own NOAA record in Illinois, and wetter than 101. Across the 7,247 U.S. stations with normals, its annual mean of 53.6°F is warmer than 55%.
In the Köppen classification computed from these normals, Neoga 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 Neoga share this climate record?
3 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.
- Stewardson, IL718 people · 9 mi SW
- Strasburg, IL517 people · 7 mi W
- Sigel, IL317 people · 9 mi S
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 Neoga's climate
What is the coldest month in Neoga?
January, with a normal high of 37°F and a normal low of 19°F. The warmest is July (87°F by day, 65°F at night).
Does it snow in Neoga?
Yes. NOAA publishes no 1991-2020 snowfall normal for Neoga's NOAA station; the nearest record that keeps one, Windsor (8 miles away), records 14 inches of snow in a normal year.
What is the rainiest month in Neoga?
June, with 4.75 in of precipitation in a normal year; the driest is February with 2.11 in.
What plant hardiness zone is Neoga in?
The USDA's 2023 map puts Neoga in zone 6b in ZIP code 62447, the nearest ZIP area.
How late can frost come in Neoga?
In half of years the last 32°F night comes after April 16; 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
- Illinois climateThe statewide normals and every place in the state
- Windsor, IL8 miles from this station, 52.6°F a year
- Mattoon, IL14 miles from this station, 53.4°F a year
- Shelbyville, IL15 miles from this station, 53.6°F a year
- Sullivan, IL16 miles from this station, 53.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made