Dubois, Indiana climate: Normal weather by month, frost dates and records
Dubois's normal year runs from 19°F January nights to 86°F July afternoons, with 51.7 inches of precipitation and 13 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.8°C, January lows of −7°C, July highs of 30°C, 1,312 mm of precipitation a year.
- NOAA stationDubois S In Forage Farm
- Station IDUSC00122309
- Location38.46°N 86.70°W
- Elevation690 ft (210 m)
- From the center5 miles
- Population (census place)399
On October 14, the normal high in Dubois is 70°F and the normal low 42°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 Dubois.
- Jan 40° 19°
- Feb 45° 22°
- Mar 55° 30°
- Apr 66° 41°
- May 75° 51°
- Jun 83° 59°
- Jul 86° 62°
- Aug 86° 60°
- Sep 80° 53°
- Oct 69° 42°
- Nov 55° 32°
- Dec 45° 24°
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 Dubois each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 19°F. The most precipitation falls in May (6.02 in), the least in February (3.18 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 40°F | 19°F | 29.4°F | 3.43 | 4.1 | 10 | <1 | 26 | 9 h 50 min |
| February | 45°F | 22°F | 33.2°F | 3.18 | 3.5 | 9 | <1 | 22 | 10 h 40 min |
| March | 55°F | 30°F | 42.2°F | 4.49 | 1.1 | 11 | <1 | 17 | 11 h 50 min |
| April | 66°F | 41°F | 53.4°F | 5.73 | 0.0 | 12 | <1 | 5 | 13 h 10 min |
| May | 75°F | 51°F | 62.9°F | 6.02 | 0.0 | 13 | 1 | <1 | 14 h 10 min |
| June | 83°F | 59°F | 71.2°F | 5.17 | 0.0 | 11 | 6 | <1 | 14 h 50 min |
| July | 86°F | 62°F | 74.3°F | 4.76 | 0.0 | 10 | 10 | <1 | 14 h 40 min |
| August | 86°F | 60°F | 73.1°F | 3.23 | 0.0 | 9 | 9 | <1 | 13 h 40 min |
| September | 80°F | 53°F | 66.4°F | 3.98 | 0.0 | 8 | 5 | <1 | 12 h 30 min |
| October | 69°F | 42°F | 55.2°F | 3.62 | 0.2 | 9 | <1 | 4 | 11 h 20 min |
| November | 55°F | 32°F | 43.5°F | 4.11 | 0.0 | 9 | <1 | 15 | 10 h 10 min |
| December | 45°F | 24°F | 34.2°F | 3.95 | 3.8 | 10 | <1 | 23 | 9 h 30 min |
| Year (annual) | 65°F | 41°F | 53.3°F | 51.67 | 12.7 | 120 | 31 | 112 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −7°C | −1.4°C | 87 mm | 10 cm |
| February | 7°C | −6°C | 0.7°C | 81 mm | 9 cm |
| March | 13°C | −1°C | 5.7°C | 114 mm | 3 cm |
| April | 19°C | 5°C | 11.9°C | 146 mm | 0 cm |
| May | 24°C | 10°C | 17.2°C | 153 mm | 0 cm |
| June | 28°C | 15°C | 21.8°C | 131 mm | 0 cm |
| July | 30°C | 17°C | 23.5°C | 121 mm | 0 cm |
| August | 30°C | 16°C | 22.8°C | 82 mm | 0 cm |
| September | 27°C | 12°C | 19.1°C | 101 mm | 0 cm |
| October | 20°C | 5°C | 12.9°C | 92 mm | 1 cm |
| November | 13°C | 0°C | 6.4°C | 104 mm | 0 cm |
| December | 7°C | −5°C | 1.2°C | 100 mm | 10 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00122309; 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 Dubois?
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 (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 USC00122309.
When is the last frost in Dubois?
In Dubois, the last spring frost (32°F) comes after April 25 in half of years and after May 12 in one year in ten; the first autumn frost comes before October 15 in half of years and before October 3 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 251 year in 10 after May 12; 9 in 10 after April 10
- First autumn frost, half of years before
- October 151 year in 10 before October 3; 9 in 10 before October 26
NOAA puts the median frost-free season at 172 days, and the season without a hard freeze (28°F) at 192 days.
A hard freeze (28°F) comes after April 13 in half of springs and before October 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Dubois in zone 6b in ZIP code 47527, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Dubois's NOAA station is in zone 6b: the coldest night of a typical year reaches −4°F (26 complete years).
Frost dates for every NOAA station in Indiana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00122309; 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 Dubois?
In a normal year in Dubois, 31 days a year reach 90°F (1 of them 100°F or more), 112 nights fall to 32°F or colder and 120 days bring measurable precipitation.
- Days at 90°F or more
- 31a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 112a normal year
- Days that stay below freezing
- 18high of 32°F or less
- Days with 0.01 inch of precipitation
- 120a normal year
- Days with 1 inch of snow or more
- 4a normal year
The highest temperature in this station's record (since 1955) is 109°F, on July 8, 2012; the lowest is −25°F, on January 19, 1994.
The wettest calendar year on that record is 2019, with 71.49 in; the snowiest season is 1995–96, with 33.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00122309; records: ACIS (NOAA Regional Climate Centers), station USC00122309. Records use complete months only; a month missing more than three days is left out.
How sunny is Dubois?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Dubois, 4.1 kWh per square metre a day. August is the sunniest month (82%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 62% | 1.9 |
| February | 63% | 2.6 |
| March | 66% | 3.7 |
| April | 72% | 5.0 |
| May | 72% | 5.5 |
| June | 80% | 6.3 |
| July | 81% | 6.1 |
| August | 82% | 5.6 |
| September | 80% | 4.6 |
| October | 74% | 3.3 |
| November | 70% | 2.3 |
| December | 60% | 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 Dubois need?
A normal year in Dubois brings 5,225 heating degree days, 3% fewer than the median U.S. place (5,373), and 975 cooling degree days, 7% 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 3,531 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,103 | 0 |
| February | 889 | 0 |
| March | 708 | 2 |
| April | 362 | 14 |
| May | 139 | 76 |
| June | 18 | 202 |
| July | 2 | 289 |
| August | 5 | 254 |
| September | 73 | 116 |
| October | 324 | 20 |
| November | 648 | 1 |
| December | 955 | 0 |
| Year (annual) | 5,225 | 975 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00122309. 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 Dubois been warmer than normal lately?
2025 averaged 52.8°F, 0.5°F below the 1991-2020 normal of 53.3°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 54.0°F | +0.7°F | 53.13 | 16.0 |
| 2022 | 52.7°F | −0.6°F | 52.71 | 6.3 |
| 2023 | 54.0°F | +0.8°F | 44.84 | 4.0 |
| 2024 | 54.8°F | +1.5°F | 48.62 | 5.3 |
| 2025 | 52.8°F | −0.5°F | 53.38 | 21.3 |
Over 57 complete years from 1955 to 2025, the station's annual mean temperature rose at a fitted 3.7°F per century (+0.20°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00122309; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Dubois's climate compare?
Dubois is warmer than 65 of the other 98 places with their own NOAA record in Indiana, and wetter than 91. Across the 7,247 U.S. stations with normals, its annual mean of 53.3°F is warmer than 55%.
In the Köppen classification computed from these normals, Dubois 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.
Questions about Dubois's climate
What is the coldest month in Dubois?
January, with a normal high of 40°F and a normal low of 19°F. The warmest is July (86°F by day, 62°F at night).
Does it snow in Dubois?
Yes: 13 inches in a normal year, falling on 6 days with 0.1 inch or more, the most in January (4.1 inches).
What is the rainiest month in Dubois?
May, with 6.02 in of precipitation in a normal year; the driest is February with 3.18 in.
What plant hardiness zone is Dubois in?
The USDA's 2023 map puts Dubois in zone 6b in ZIP code 47527, the nearest ZIP area. By the same method at Dubois's NOAA station, the coldest night of a typical year reaches −4°F (26 years, 1991-2020): zone 6b.
How late can frost come in Dubois?
In half of years the last 32°F night comes after April 25; in one year in ten it comes after May 12. Waiting until May 12 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Indiana climateThe statewide normals and every place in the state
- Patoka Lake, IN1 miles from this station, 57.0°F a year
- Shoals, IN9 miles from this station, 55.6°F a year
- Paoli, IN14 miles from this station, 54.1°F a year
- English, IN17 miles from this station, 56.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made