Boonville, Indiana climate: Normal weather by month, frost dates and records
Boonville's normal year runs from 25°F January nights to 89°F July afternoons, with 51.2 inches of precipitation and 11 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.1°C, January lows of −4°C, July highs of 31°C, 1,300 mm of precipitation a year.
- NOAA stationBoonville (1 mi S)
- Station IDUSC00120852
- Location38.03°N 87.27°W
- Elevation400 ft (122 m)
- Population6,687
On October 23, the normal high in Boonville is 67°F and the normal low 45°F, and the chance of measurable rain or snow is 27%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Boonville.
- Jan 42° 25°
- Feb 47° 29°
- Mar 58° 36°
- Apr 70° 46°
- May 79° 56°
- Jun 86° 65°
- Jul 89° 68°
- Aug 88° 66°
- Sep 82° 58°
- Oct 70° 47°
- Nov 57° 37°
- Dec 46° 29°
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 Boonville each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 25°F. The most precipitation falls in April (5.52 in), the least in August (3.22 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 42°F | 25°F | 33.8°F | 3.52 | 3.4 | 9 | <1 | 23 | 9 h 50 min |
| February | 47°F | 29°F | 38.0°F | 3.59 | 3.2 | 9 | <1 | 19 | 10 h 50 min |
| March | 58°F | 36°F | 47.0°F | 4.93 | 1.6 | 11 | <1 | 12 | 11 h 50 min |
| April | 70°F | 46°F | 58.0°F | 5.52 | 0.0 | 11 | <1 | 3 | 13 h 10 min |
| May | 79°F | 56°F | 67.3°F | 5.14 | 0.0 | 12 | 2 | <1 | 14 h 10 min |
| June | 86°F | 65°F | 75.4°F | 4.56 | 0.0 | 9 | 10 | <1 | 14 h 50 min |
| July | 89°F | 68°F | 78.3°F | 4.69 | 0.0 | 9 | 14 | <1 | 14 h 30 min |
| August | 88°F | 66°F | 76.7°F | 3.22 | 0.0 | 7 | 11 | <1 | 13 h 40 min |
| September | 82°F | 58°F | 70.0°F | 3.80 | 0.0 | 7 | 4 | <1 | 12 h 30 min |
| October | 70°F | 47°F | 58.6°F | 3.75 | 0.1 | 8 | <1 | 2 | 11 h 20 min |
| November | 57°F | 37°F | 46.6°F | 4.22 | 0.3 | 9 | <1 | 12 | 10 h 10 min |
| December | 46°F | 29°F | 37.5°F | 4.23 | 2.7 | 10 | <1 | 20 | 9 h 30 min |
| Year (annual) | 68°F | 47°F | 57.3°F | 51.17 | 11.3 | 112 | 41 | 90 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 6°C | −4°C | 1.0°C | 89 mm | 9 cm |
| February | 9°C | −2°C | 3.3°C | 91 mm | 8 cm |
| March | 14°C | 2°C | 8.3°C | 125 mm | 4 cm |
| April | 21°C | 8°C | 14.4°C | 140 mm | 0 cm |
| May | 26°C | 13°C | 19.6°C | 131 mm | 0 cm |
| June | 30°C | 18°C | 24.1°C | 116 mm | 0 cm |
| July | 31°C | 20°C | 25.7°C | 119 mm | 0 cm |
| August | 31°C | 19°C | 24.8°C | 82 mm | 0 cm |
| September | 28°C | 15°C | 21.1°C | 97 mm | 0 cm |
| October | 21°C | 8°C | 14.8°C | 95 mm | 0 cm |
| November | 14°C | 3°C | 8.1°C | 107 mm | 1 cm |
| December | 8°C | −2°C | 3.1°C | 107 mm | 7 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00120852; 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 Boonville?
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 USC00120852.
When is the last frost in Boonville?
In Boonville, the last spring frost (32°F) comes after April 12 in half of years and after April 28 in one year in ten; the first autumn frost comes before October 25 in half of years and before October 12 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 121 year in 10 after April 28; 9 in 10 after March 28
- First autumn frost, half of years before
- October 251 year in 10 before October 12; 9 in 10 before November 5
NOAA puts the median frost-free season at 196 days, and the season without a hard freeze (28°F) at 218 days.
A hard freeze (28°F) comes after March 30 in half of springs and before November 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Boonville in zone 7a in ZIP code 47601, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Boonville's NOAA station is in zone 6b: the coldest night of a typical year reaches 0°F (30 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 USC00120852; 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 Boonville?
In a normal year in Boonville, 41 days a year reach 90°F (1 of them 100°F or more), 90 nights fall to 32°F or colder and 112 days bring measurable precipitation.
- Days at 90°F or more
- 41a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 90a normal year
- Days that stay below freezing
- 14high of 32°F or less
- Days with 0.01 inch of precipitation
- 112a normal year
- Days with 1 inch of snow or more
- 4a normal year
The highest temperature in this station's record (since 1897) is 107°F, on July 7, 2012; the lowest is −25°F, on February 13, 1899.
The wettest calendar year on that record is 2011, with 72.20 in; the snowiest season is 1995–96, with 33.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00120852; records: ACIS (NOAA Regional Climate Centers), station USC00120852. Records use complete months only; a month missing more than three days is left out.
How sunny is Boonville?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Boonville, 4.1 kWh per square metre a day. August is the sunniest month (82%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 2.0 |
| February | 64% | 2.7 |
| March | 67% | 3.7 |
| April | 72% | 5.0 |
| May | 73% | 5.6 |
| June | 81% | 6.4 |
| July | 82% | 6.3 |
| August | 82% | 5.7 |
| September | 80% | 4.7 |
| October | 75% | 3.4 |
| November | 71% | 2.4 |
| December | 62% | 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 Boonville need?
A normal year in Boonville brings 4,277 heating degree days, 20% fewer than the median U.S. place (5,373), and 1,491 cooling degree days, 64% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,391 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 969 | 0 |
| February | 756 | 0 |
| March | 561 | 5 |
| April | 243 | 33 |
| May | 69 | 142 |
| June | 4 | 316 |
| July | 0 | 411 |
| August | 1 | 362 |
| September | 34 | 183 |
| October | 232 | 36 |
| November | 555 | 3 |
| December | 853 | 0 |
| Year (annual) | 4,277 | 1,491 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00120852. 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 Boonville been warmer than normal lately?
2025 averaged 58.2°F, 0.9°F above the 1991-2020 normal of 57.3°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 58.0°F | +0.7°F | 50.70 | 11.8 |
| 2022 | 57.0°F | −0.3°F | 50.19 | 12.4 |
| 2024 | 59.8°F | +2.5°F | – | 3.5 |
| 2025 | 58.2°F | +0.9°F | 55.96 | 17.9 |
Over 34 complete years from 1991 to 2025, the station's annual mean temperature rose at a fitted 5.3°F per century (+0.29°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00120852; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Boonville's climate compare?
Boonville is warmer than 97 of the other 98 places with their own NOAA record in Indiana, and wetter than 89. Across the 7,247 U.S. stations with normals, its annual mean of 57.3°F is warmer than 67%.
In the Köppen classification computed from these normals, Boonville is Cfa: temperate, 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 Boonville share this climate record?
7 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.
- Chandler, IN3,914 people · 5 mi W
- Rockport, IN1,989 people · 15 mi SE
- Reo, IN502 people · 12 mi SE
- Chrisney, IN474 people · 13 mi E
- Richland, IN416 people · 8 mi SE
- Tennyson, IN225 people · 9 mi NE
- Folsomville, IN121 people · 9 mi NE
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 Boonville's climate
What is the coldest month in Boonville?
January, with a normal high of 42°F and a normal low of 25°F. The warmest is July (89°F by day, 68°F at night).
Does it snow in Boonville?
Yes: 11 inches in a normal year, falling on 7 days with 0.1 inch or more, the most in January (3.4 inches).
What is the rainiest month in Boonville?
April, with 5.52 in of precipitation in a normal year; the driest is August with 3.22 in.
What plant hardiness zone is Boonville in?
The USDA's 2023 map puts Boonville in zone 7a in ZIP code 47601, the nearest ZIP area. By the same method at Boonville's NOAA station, the coldest night of a typical year reaches 0°F (30 years, 1991-2020): zone 6b.
How late can frost come in Boonville?
In half of years the last 32°F night comes after April 12; in one year in ten it comes after April 28. Waiting until April 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Indiana climateThe statewide normals and every place in the state
- Newburgh, IN9 miles from this station, 57.1°F a year
- Evansville, IN14 miles from this station, 57.2°F a year
- Stendal, IN17 miles from this station, 55.3°F a year
- Henderson, KY23 miles from this station, 56.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made