Brookville, Indiana climate: Normal weather by month, frost dates and records
Brookville's normal year runs from 21°F January nights to 87°F July afternoons, with 43.8 inches of precipitation and 18 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.9°C, January lows of −6°C, July highs of 31°C, 1,113 mm of precipitation a year.
- NOAA stationBrookville
- Station IDUSC00121030
- Location39.42°N 85.01°W
- Elevation630 ft (192 m)
- From the centerunder 1 mile
- Population2,655
On October 23, the normal high in Brookville is 65°F and the normal low 40°F, and the chance of measurable rain or snow is 30%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Brookville.
- Jan 38° 21°
- Feb 42° 23°
- Mar 53° 31°
- Apr 66° 41°
- May 76° 51°
- Jun 84° 60°
- Jul 87° 64°
- Aug 86° 62°
- Sep 81° 55°
- Oct 68° 42°
- Nov 54° 33°
- 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 Brookville each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 21°F. The most precipitation falls in June (4.89 in), the least in February (2.67 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 38°F | 21°F | 29.3°F | 3.36 | 6.1 | 11 | <1 | 26 | 9 h 40 min |
| February | 42°F | 23°F | 32.5°F | 2.67 | 5.0 | 9 | <1 | 24 | 10 h 40 min |
| March | 53°F | 31°F | 41.8°F | 3.58 | 2.1 | 11 | <1 | 19 | 11 h 50 min |
| April | 66°F | 41°F | 53.2°F | 4.60 | 0.0 | 12 | <1 | 6 | 13 h 10 min |
| May | 76°F | 51°F | 63.4°F | 4.79 | 0.0 | 13 | 1 | 1 | 14 h 20 min |
| June | 84°F | 60°F | 71.9°F | 4.89 | 0.0 | 11 | 6 | <1 | 15 h |
| July | 87°F | 64°F | 75.4°F | 3.89 | 0.0 | 10 | 10 | <1 | 14 h 40 min |
| August | 86°F | 62°F | 74.4°F | 3.00 | 0.0 | 8 | 9 | <1 | 13 h 50 min |
| September | 81°F | 55°F | 67.5°F | 2.96 | 0.0 | 8 | 4 | <1 | 12 h 30 min |
| October | 68°F | 42°F | 55.3°F | 3.30 | 0.1 | 9 | <1 | 5 | 11 h 10 min |
| November | 54°F | 33°F | 43.4°F | 3.40 | 0.3 | 10 | <1 | 16 | 10 h |
| December | 43°F | 26°F | 34.1°F | 3.37 | 4.0 | 11 | <1 | 24 | 9 h 20 min |
| Year (annual) | 65°F | 42°F | 53.5°F | 43.81 | 17.6 | 122 | 32 | 119 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 3°C | −6°C | −1.5°C | 85 mm | 15 cm |
| February | 6°C | −5°C | 0.3°C | 68 mm | 13 cm |
| March | 12°C | −1°C | 5.4°C | 91 mm | 5 cm |
| April | 19°C | 5°C | 11.8°C | 117 mm | 0 cm |
| May | 24°C | 11°C | 17.4°C | 122 mm | 0 cm |
| June | 29°C | 16°C | 22.2°C | 124 mm | 0 cm |
| July | 31°C | 18°C | 24.1°C | 99 mm | 0 cm |
| August | 30°C | 17°C | 23.6°C | 76 mm | 0 cm |
| September | 27°C | 13°C | 19.7°C | 75 mm | 0 cm |
| October | 20°C | 6°C | 12.9°C | 84 mm | 0 cm |
| November | 12°C | 0°C | 6.3°C | 86 mm | 1 cm |
| December | 6°C | −4°C | 1.2°C | 86 mm | 10 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00121030; 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 Brookville?
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 USC00121030.
When is the last frost in Brookville?
In Brookville, the last spring frost (32°F) comes after April 20 in half of years and after May 7 in one year in ten; the first autumn frost comes before October 21 in half of years and before October 6 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 201 year in 10 after May 7; 9 in 10 after April 6
- First autumn frost, half of years before
- October 211 year in 10 before October 6; 9 in 10 before November 3
NOAA puts the median frost-free season at 182 days, and the season without a hard freeze (28°F) at 207 days.
A hard freeze (28°F) comes after April 6 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Brookville in zone 6a in ZIP code 47012, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Brookville's NOAA station is in zone 6b: the coldest night of a typical year reaches −3°F (22 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Indiana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00121030; 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 Brookville?
In a normal year in Brookville, 32 days a year reach 90°F (1 of them 100°F or more), 119 nights fall to 32°F or colder and 122 days bring measurable precipitation.
- Days at 90°F or more
- 32a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 119a normal year
- Days that stay below freezing
- 24high of 32°F or less
- Days with 0.01 inch of precipitation
- 122a normal year
- Days with 1 inch of snow or more
- 7a normal year
The highest temperature in this station's record (since 1925) is 108°F, on August 20, 1936; the lowest is −31°F, on January 20, 1994.
The wettest calendar year on that record is 1990, with 63.73 in; the snowiest season is 1950–51, with 42.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00121030; records: ACIS (NOAA Regional Climate Centers), station USC00121030. Records use complete months only; a month missing more than three days is left out.
How sunny is Brookville?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Brookville, 4.0 kWh per square metre a day. August is the sunniest month (81%) and December the cloudiest (58%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 60% | 1.8 |
| February | 62% | 2.6 |
| March | 66% | 3.6 |
| April | 71% | 4.9 |
| May | 72% | 5.5 |
| June | 79% | 6.2 |
| July | 80% | 6.1 |
| August | 81% | 5.6 |
| September | 79% | 4.5 |
| October | 73% | 3.2 |
| November | 69% | 2.2 |
| December | 58% | 1.5 |
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 Brookville need?
A normal year in Brookville brings 5,245 heating degree days, 2% fewer than the median U.S. place (5,373), and 1,092 cooling degree days, 20% 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 3,639 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,107 | 0 |
| February | 910 | 0 |
| March | 721 | 2 |
| April | 368 | 12 |
| May | 133 | 83 |
| June | 16 | 221 |
| July | 1 | 323 |
| August | 3 | 292 |
| September | 62 | 137 |
| October | 320 | 21 |
| November | 647 | 1 |
| December | 959 | 0 |
| Year (annual) | 5,245 | 1,092 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00121030. 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 Brookville been warmer than normal lately?
2025 averaged 54.1°F, 0.6°F above the 1991-2020 normal of 53.5°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 54.8°F | +1.3°F | 47.93 | – |
| 2022 | 53.3°F | −0.2°F | 39.18 | – |
| 2023 | 55.6°F | +2.1°F | 40.53 | 4.0 |
| 2025 | 54.1°F | +0.6°F | 48.35 | 25.3 |
Over 71 complete years from 1886 to 2025, the station's annual mean temperature rose at a fitted 2.1°F per century (+0.12°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00121030; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Brookville's climate compare?
Brookville is warmer than 66 of the other 98 places with their own NOAA record in Indiana, and wetter than 51. Across the 7,247 U.S. stations with normals, its annual mean of 53.5°F is warmer than 55%.
In the Köppen classification computed from these normals, Brookville 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 Brookville 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.
- Oxford, OH22,585 people · 15 mi E
- Darrtown, OH686 people · 19 mi E
- St. Leon, IN669 people · 9 mi S
- Oldenburg, IN647 people · 12 mi SW
- Everton, IN624 people · 11 mi NW
- Laurel, IN412 people · 11 mi NW
- Metamora, IN402 people · 7 mi W
- College Corner, OH397 people · 15 mi NE
- New Haven, OH220 people · 17 mi SE
- Cedar Grove, IN146 people · 6 mi SE
- Blooming Grove, IN134 people · 7 mi NW
- Peppertown, IN83 people · 9 mi W
- Lake View, IN36 people · 13 mi W
- Lakeshore Resort, IN0 people · 6 mi N
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 Brookville's climate
What is the coldest month in Brookville?
January, with a normal high of 38°F and a normal low of 21°F. The warmest is July (87°F by day, 64°F at night).
Does it snow in Brookville?
Yes: 18 inches in a normal year, falling on 13 days with 0.1 inch or more, the most in January (6.1 inches).
What is the rainiest month in Brookville?
June, with 4.89 in of precipitation in a normal year; the driest is February with 2.67 in.
What plant hardiness zone is Brookville in?
The USDA's 2023 map puts Brookville in zone 6a in ZIP code 47012, the nearest ZIP area. By the same method at Brookville's NOAA station, the coldest night of a typical year reaches −3°F (22 years, 1991-2020): zone 6b.
How late can frost come in Brookville?
In half of years the last 32°F night comes after April 20; in one year in ten it comes after May 7. Waiting until May 7 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Indiana climateThe statewide normals and every place in the state
- Milan, IN18 miles from this station, 51.3°F a year
- Fairfield, OH23 miles from this station, 53.6°F a year
- Greensburg, IN26 miles from this station, 53.6°F a year
- Mack, OH26 miles from this station, 53.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made