Havana, Illinois climate: Normal weather by month, frost dates and records
Havana's normal year runs from 16°F January nights to 88°F July afternoons, with 41.0 inches of precipitation and 28 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.4°C, January lows of −9°C, July highs of 31°C, 1,042 mm of precipitation a year.
- NOAA stationHavana
- Station IDUSC00113940
- Location40.30°N 90.06°W
- Elevation463 ft (141 m)
- From the centerunder 1 mile
- Population2,826
On October 23, the normal high in Havana is 65°F and the normal low 40°F, and the chance of measurable rain or snow is 26%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Havana.
- Jan 34° 16°
- Feb 39° 20°
- Mar 51° 30°
- Apr 64° 41°
- May 75° 53°
- Jun 85° 62°
- Jul 88° 65°
- Aug 86° 63°
- Sep 80° 54°
- Oct 68° 42°
- Nov 52° 32°
- Dec 39° 22°
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 Havana each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 16°F. The most precipitation falls in May (5.08 in), the least in February (2.18 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 34°F | 16°F | 25.0°F | 2.20 | 9.7 | 8 | <1 | 29 | 9 h 40 min |
| February | 39°F | 20°F | 29.6°F | 2.18 | 5.8 | 7 | <1 | 24 | 10 h 40 min |
| March | 51°F | 30°F | 40.7°F | 2.72 | 3.2 | 9 | <1 | 21 | 11 h 50 min |
| April | 64°F | 41°F | 52.4°F | 4.22 | 1.2 | 10 | <1 | 6 | 13 h 10 min |
| May | 75°F | 53°F | 63.7°F | 5.08 | 0.0 | 11 | 1 | <1 | 14 h 20 min |
| June | 85°F | 62°F | 73.1°F | 4.73 | 0.0 | 9 | 8 | <1 | 15 h |
| July | 88°F | 65°F | 76.6°F | 4.18 | 0.0 | 8 | 12 | <1 | 14 h 50 min |
| August | 86°F | 63°F | 74.4°F | 4.02 | 0.0 | 7 | 9 | <1 | 13 h 50 min |
| September | 80°F | 54°F | 66.9°F | 3.26 | 0.0 | 7 | 4 | <1 | 12 h 30 min |
| October | 68°F | 42°F | 54.9°F | 3.37 | 0.0 | 8 | 1 | 7 | 11 h 10 min |
| November | 52°F | 32°F | 42.1°F | 2.73 | 1.1 | 7 | <1 | 18 | 10 h |
| December | 39°F | 22°F | 30.5°F | 2.35 | 6.9 | 8 | <1 | 27 | 9 h 20 min |
| Year (annual) | 63°F | 42°F | 52.5°F | 41.04 | 27.9 | 98 | 35 | 133 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −9°C | −3.9°C | 56 mm | 25 cm |
| February | 4°C | −6°C | −1.3°C | 55 mm | 15 cm |
| March | 11°C | −1°C | 4.8°C | 69 mm | 8 cm |
| April | 18°C | 5°C | 11.3°C | 107 mm | 3 cm |
| May | 24°C | 12°C | 17.6°C | 129 mm | 0 cm |
| June | 29°C | 16°C | 22.8°C | 120 mm | 0 cm |
| July | 31°C | 18°C | 24.8°C | 106 mm | 0 cm |
| August | 30°C | 17°C | 23.6°C | 102 mm | 0 cm |
| September | 27°C | 12°C | 19.4°C | 83 mm | 0 cm |
| October | 20°C | 6°C | 12.7°C | 86 mm | 0 cm |
| November | 11°C | 0°C | 5.6°C | 69 mm | 3 cm |
| December | 4°C | −6°C | −0.8°C | 60 mm | 18 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00113940; 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 Havana?
Normal highs sit between 65°F and 85°F in May, June, 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 USC00113940.
When is the last frost in Havana?
In Havana, the last spring frost (32°F) comes after April 17 in half of years and after May 3 in one year in ten; the first autumn frost comes before October 19 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 171 year in 10 after May 3; 9 in 10 after April 2
- First autumn frost, half of years before
- October 191 year in 10 before October 1; 9 in 10 before October 31
NOAA puts the median frost-free season at 185 days, and the season without a hard freeze (28°F) at 204 days.
A hard freeze (28°F) comes after April 5 in half of springs and before October 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Havana in zone 6a in ZIP code 62644, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Havana's NOAA station is in zone 6a: the coldest night of a typical year reaches −10°F (16 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 USC00113940; 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 Havana?
In a normal year in Havana, 35 days a year reach 90°F (1 of them 100°F or more), 133 nights fall to 32°F or colder and 98 days bring measurable precipitation.
- Days at 90°F or more
- 35a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 133a normal year
- Days that stay below freezing
- 33high of 32°F or less
- Days with 0.01 inch of precipitation
- 98a normal year
- Days with 1 inch of snow or more
- 10a normal year
The highest temperature in this station's record (since 1958) is 106°F, on July 23, 1983; the lowest is −30°F, on January 5, 1999.
The wettest calendar year on that record is 1993, with 60.51 in; the snowiest season is 1981–82, with 69.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00113940; records: ACIS (NOAA Regional Climate Centers), station USC00113940. Records use complete months only; a month missing more than three days is left out.
How sunny is Havana?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Havana, 4.1 kWh per square metre a day. July is the sunniest month (82%) and January the cloudiest (63%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 1.9 |
| February | 68% | 2.8 |
| March | 68% | 3.8 |
| April | 70% | 4.9 |
| May | 73% | 5.6 |
| June | 79% | 6.3 |
| July | 82% | 6.4 |
| August | 81% | 5.5 |
| September | 82% | 4.7 |
| October | 73% | 3.2 |
| November | 70% | 2.2 |
| December | 63% | 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 Havana need?
A normal year in Havana brings 5,686 heating degree days, 6% more than the median U.S. place (5,373), and 1,161 cooling degree days, 28% 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 3,666 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,241 | 0 |
| February | 991 | 0 |
| March | 754 | 1 |
| April | 392 | 12 |
| May | 128 | 86 |
| June | 15 | 258 |
| July | 0 | 360 |
| August | 3 | 296 |
| September | 71 | 129 |
| October | 333 | 19 |
| November | 688 | 1 |
| December | 1,071 | 0 |
| Year (annual) | 5,686 | 1,161 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00113940. 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 Havana's climate compare?
Havana is warmer than 84 of the other 143 places with their own NOAA record in Illinois, and wetter than 90. Across the 7,247 U.S. stations with normals, its annual mean of 52.5°F is warmer than 52%.
In the Köppen classification computed from these normals, Havana 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 Havana share this climate record?
14 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.
- Canton, IL12,896 people · 18 mi N
- Lewistown, IL1,960 people · 8 mi NW
- Manito, IL1,488 people · 17 mi NE
- Cuba, IL1,137 people · 15 mi NW
- St. David, IL505 people · 13 mi N
- Ipava, IL426 people · 14 mi W
- Bath, IL265 people · 9 mi SW
- Kilbourne, IL259 people · 11 mi S
- Dunfermline, IL252 people · 13 mi N
- Forest City, IL210 people · 13 mi E
- Bryant, IL164 people · 11 mi N
- Goofy Ridge, IL148 people · 9 mi NE
- Liverpool, IL91 people · 7 mi NE
- Topeka, IL56 people · 7 mi E
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 Havana's climate
What is the coldest month in Havana?
January, with a normal high of 34°F and a normal low of 16°F. The warmest is July (88°F by day, 65°F at night).
Does it snow in Havana?
Yes: 28 inches in a normal year, falling on 13 days with 0.1 inch or more, the most in January (9.7 inches).
What is the rainiest month in Havana?
May, with 5.08 in of precipitation in a normal year; the driest is February with 2.18 in.
What plant hardiness zone is Havana in?
The USDA's 2023 map puts Havana in zone 6a in ZIP code 62644, the nearest ZIP area. By the same method at Havana's NOAA station, the coldest night of a typical year reaches −10°F (16 years, 1991-2020): zone 6a.
How late can frost come in Havana?
In half of years the last 32°F night comes after April 17; in one year in ten it comes after May 3. Waiting until May 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Illinois climateThe statewide normals and every place in the state
- Petersburg, IL23 miles from this station, 52.3°F a year
- Mason City, IL24 miles from this station, 51.7°F a year
- Rushville, IL29 miles from this station, 51.7°F a year
- Prairie City, IL29 miles from this station, 51.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made