Flora, Illinois climate: Normal weather by month, frost dates and records
Flora's normal year runs from 21°F January nights to 89°F July afternoons, with 48.0 inches of precipitation and 12 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.8°C, January lows of −6°C, July highs of 32°C, 1,219 mm of precipitation a year.
- NOAA stationFlora
- Station IDUSC00113106
- Location38.68°N 88.48°W
- Elevation481 ft (147 m)
- From the centerunder 1 mile
- Population4,647
On October 23, the normal high in Flora is 66°F and the normal low 42°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 Flora.
- Jan 39° 21°
- Feb 44° 25°
- Mar 55° 33°
- Apr 67° 44°
- May 77° 54°
- Jun 86° 63°
- Jul 89° 66°
- Aug 88° 63°
- Sep 82° 55°
- Oct 69° 44°
- Nov 55° 34°
- Dec 43° 26°
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 Flora each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 21°F. The most precipitation falls in June (5.86 in), the least in February (2.54 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 39°F | 21°F | 30.0°F | 2.95 | 3.1 | 7 | <1 | 27 | 9 h 40 min |
| February | 44°F | 25°F | 34.5°F | 2.54 | 3.2 | 8 | <1 | 23 | 10 h 40 min |
| March | 55°F | 33°F | 43.8°F | 3.83 | 0.8 | 10 | <1 | 15 | 11 h 50 min |
| April | 67°F | 44°F | 55.3°F | 5.31 | 0.0 | 9 | <1 | 4 | 13 h 10 min |
| May | 77°F | 54°F | 65.5°F | 5.09 | 0.0 | 12 | 2 | <1 | 14 h 10 min |
| June | 86°F | 63°F | 74.7°F | 5.86 | 0.0 | 10 | 10 | <1 | 14 h 50 min |
| July | 89°F | 66°F | 77.4°F | 4.19 | 0.0 | 8 | 15 | <1 | 14 h 40 min |
| August | 88°F | 63°F | 75.6°F | 3.73 | 0.0 | 7 | 11 | <1 | 13 h 40 min |
| September | 82°F | 55°F | 68.5°F | 3.34 | 0.0 | 7 | 6 | <1 | 12 h 30 min |
| October | 69°F | 44°F | 56.6°F | 3.67 | 0.0 | 8 | 1 | 3 | 11 h 20 min |
| November | 55°F | 34°F | 44.2°F | 4.23 | 0.0 | 9 | <1 | 14 | 10 h 10 min |
| December | 43°F | 26°F | 34.5°F | 3.26 | 4.5 | 9 | <1 | 24 | 9 h 30 min |
| Year (annual) | 66°F | 44°F | 55.0°F | 48.00 | 11.6 | 104 | 45 | 109 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −6°C | −1.1°C | 75 mm | 8 cm |
| February | 7°C | −4°C | 1.4°C | 65 mm | 8 cm |
| March | 13°C | 1°C | 6.6°C | 97 mm | 2 cm |
| April | 19°C | 6°C | 12.9°C | 135 mm | 0 cm |
| May | 25°C | 12°C | 18.6°C | 129 mm | 0 cm |
| June | 30°C | 17°C | 23.7°C | 149 mm | 0 cm |
| July | 32°C | 19°C | 25.2°C | 106 mm | 0 cm |
| August | 31°C | 17°C | 24.2°C | 95 mm | 0 cm |
| September | 28°C | 13°C | 20.3°C | 85 mm | 0 cm |
| October | 21°C | 7°C | 13.7°C | 93 mm | 0 cm |
| November | 13°C | 1°C | 6.8°C | 107 mm | 0 cm |
| December | 6°C | −3°C | 1.4°C | 83 mm | 11 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00113106; 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 Flora?
Normal highs sit between 65°F and 85°F in April, May, 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 USC00113106.
When is the last frost in Flora?
In Flora, the last spring frost (32°F) comes after April 9 in half of years and after April 23 in one year in ten; the first autumn frost comes before October 24 in half of years and before October 11 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 91 year in 10 after April 23; 9 in 10 after March 29
- First autumn frost, half of years before
- October 241 year in 10 before October 11; 9 in 10 before November 6
NOAA puts the median frost-free season at 198 days, and the season without a hard freeze (28°F) at 218 days.
A hard freeze (28°F) comes after March 31 in half of springs and before November 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Flora in zone 6b in ZIP code 62839, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Flora's NOAA station is in zone 6b: the coldest night of a typical year reaches 0°F (20 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 USC00113106; 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 Flora?
In a normal year in Flora, 45 days a year reach 90°F (2 of them 100°F or more), 109 nights fall to 32°F or colder and 104 days bring measurable precipitation.
- Days at 90°F or more
- 45a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 109a normal year
- Days that stay below freezing
- 22high of 32°F or less
- Days with 0.01 inch of precipitation
- 104a normal year
- Days with 1 inch of snow or more
- 4a normal year
The highest temperature in this station's record (since 2000) is 107°F, on July 8, 2012; the lowest is −14°F, on January 7, 2014.
The wettest calendar year on that record is 2011, with 62.02 in; the snowiest season is 2002–03, with 26.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00113106; records: ACIS (NOAA Regional Climate Centers), station USC00113106. Records use complete months only; a month missing more than three days is left out.
How sunny is Flora?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Flora, 4.2 kWh per square metre a day. August is the sunniest month (83%) and December the cloudiest (63%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 2.0 |
| February | 66% | 2.8 |
| March | 67% | 3.7 |
| April | 73% | 5.0 |
| May | 73% | 5.6 |
| June | 82% | 6.5 |
| July | 83% | 6.3 |
| August | 83% | 5.7 |
| September | 81% | 4.7 |
| October | 76% | 3.4 |
| November | 71% | 2.4 |
| December | 63% | 1.7 |
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 Flora need?
A normal year in Flora brings 4,933 heating degree days, 8% fewer than the median U.S. place (5,373), and 1,337 cooling degree days, 47% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,018 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,085 | 0 |
| February | 855 | 0 |
| March | 662 | 3 |
| April | 312 | 21 |
| May | 101 | 114 |
| June | 7 | 296 |
| July | 0 | 385 |
| August | 2 | 330 |
| September | 51 | 156 |
| October | 290 | 31 |
| November | 625 | 1 |
| December | 944 | 0 |
| Year (annual) | 4,933 | 1,337 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00113106. 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 Flora been warmer than normal lately?
2025 averaged 56.5°F, 1.5°F above the 1991-2020 normal of 55.0°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 56.1°F | +1.1°F | 53.37 | 15.0 |
| 2022 | 54.8°F | −0.3°F | 46.73 | 4.4 |
| 2023 | 57.4°F | +2.4°F | 44.62 | 4.0 |
| 2024 | 58.0°F | +3.0°F | 47.19 | 5.0 |
| 2025 | 56.5°F | +1.5°F | 50.33 | 15.0 |
Source: observed years: ACIS, station USC00113106. A year counts only with all twelve months complete.
How does Flora's climate compare?
Flora is warmer than 119 of the other 143 places with their own NOAA record in Illinois, and wetter than 129. Across the 7,247 U.S. stations with normals, its annual mean of 55.0°F is warmer than 60%.
In the Köppen classification computed from these normals, Flora 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 Flora share this climate record?
6 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.
- Louisville, IL1,107 people · 6 mi N
- Clay City, IL819 people · 7 mi E
- Xenia, IL370 people · 9 mi W
- Iola, IL96 people · 13 mi NW
- Sailor Springs, IL91 people · 9 mi NE
- Johnsonville, IL71 people · 11 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.
What do Flora's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Flora. This page uses Flora; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Flora (5 mi NW) USC00113109 | 6 mi NW | 500 ft | 56.1°F | 23°F | 88°F | 46.4 | 8 | April 10 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Flora's climate
What is the coldest month in Flora?
January, with a normal high of 39°F and a normal low of 21°F. The warmest is July (89°F by day, 66°F at night).
Does it snow in Flora?
Yes: 12 inches in a normal year, falling on 5 days with 0.1 inch or more, the most in December (4.5 inches).
What is the rainiest month in Flora?
June, with 5.86 in of precipitation in a normal year; the driest is February with 2.54 in.
What plant hardiness zone is Flora in?
The USDA's 2023 map puts Flora in zone 6b in ZIP code 62839, the nearest ZIP area. By the same method at Flora's NOAA station, the coldest night of a typical year reaches 0°F (20 years, 1991-2020): zone 6b.
How late can frost come in Flora?
In half of years the last 32°F night comes after April 9; in one year in ten it comes after April 23. Waiting until April 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Illinois climateThe statewide normals and every place in the state
- Olney, IL22 miles from this station, 54.2°F a year
- Fairfield, IL22 miles from this station, 57.1°F a year
- Salem, IL25 miles from this station, 54.9°F a year
- Newton, IL27 miles from this station, 54.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made