Indiana, Pennsylvania climate: Normal weather by month, frost dates and records
Indiana's normal year runs from 18°F January nights to 83°F July afternoons, with 47.9 inches of precipitation and 46 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.7°C, January lows of −8°C, July highs of 28°C, 1,216 mm of precipitation a year.
- NOAA stationIndiana (3 mi SE)
- Station IDUSC00364214
- Location40.60°N 79.12°W
- Elevation1,102 ft (336 m)
- From the center3 miles
- Population14,294
On October 23, the normal high in Indiana is 61°F and the normal low 38°F, and the chance of measurable rain or snow is 42%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Indiana.
- Jan 36° 18°
- Feb 39° 18°
- Mar 49° 25°
- Apr 62° 35°
- May 72° 46°
- Jun 79° 54°
- Jul 83° 59°
- Aug 81° 58°
- Sep 75° 51°
- Oct 63° 40°
- Nov 51° 30°
- Dec 41° 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 Indiana each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 18°F. The most precipitation falls in July (5.13 in), the least in February (2.95 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 36°F | 18°F | 26.7°F | 3.64 | 13.3 | 17 | <1 | 27 | 9 h 30 min |
| February | 39°F | 18°F | 28.8°F | 2.95 | 11.8 | 14 | <1 | 24 | 10 h 40 min |
| March | 49°F | 25°F | 37.1°F | 3.88 | 6.1 | 14 | <1 | 22 | 11 h 50 min |
| April | 62°F | 35°F | 48.3°F | 4.03 | 1.1 | 15 | <1 | 10 | 13 h 10 min |
| May | 72°F | 46°F | 58.7°F | 4.32 | 0.0 | 15 | <1 | 2 | 14 h 20 min |
| June | 79°F | 54°F | 66.5°F | 4.81 | 0.0 | 14 | 1 | <1 | 15 h |
| July | 83°F | 59°F | 70.7°F | 5.13 | 0.0 | 14 | 3 | <1 | 14 h 50 min |
| August | 81°F | 58°F | 69.4°F | 4.26 | 0.0 | 12 | 2 | <1 | 13 h 50 min |
| September | 75°F | 51°F | 63.0°F | 4.18 | 0.0 | 12 | 1 | <1 | 12 h 30 min |
| October | 63°F | 40°F | 51.9°F | 3.52 | 0.0 | 13 | <1 | 5 | 11 h 10 min |
| November | 51°F | 30°F | 40.5°F | 3.50 | 2.7 | 13 | <1 | 17 | 10 h |
| December | 41°F | 24°F | 32.3°F | 3.64 | 10.8 | 15 | <1 | 25 | 9 h 20 min |
| Year (annual) | 61°F | 38°F | 49.5°F | 47.86 | 45.8 | 167 | 8 | 131 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 2°C | −8°C | −2.9°C | 92 mm | 34 cm |
| February | 4°C | −8°C | −1.8°C | 75 mm | 30 cm |
| March | 9°C | −4°C | 2.8°C | 99 mm | 15 cm |
| April | 17°C | 2°C | 9.1°C | 102 mm | 3 cm |
| May | 22°C | 8°C | 14.8°C | 110 mm | 0 cm |
| June | 26°C | 12°C | 19.2°C | 122 mm | 0 cm |
| July | 28°C | 15°C | 21.5°C | 130 mm | 0 cm |
| August | 27°C | 14°C | 20.8°C | 108 mm | 0 cm |
| September | 24°C | 11°C | 17.2°C | 106 mm | 0 cm |
| October | 17°C | 5°C | 11.1°C | 89 mm | 0 cm |
| November | 11°C | −1°C | 4.7°C | 89 mm | 7 cm |
| December | 5°C | −5°C | 0.2°C | 92 mm | 27 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00364214; 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 Indiana?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (12).
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 USC00364214.
When is the last frost in Indiana?
In Indiana, the last spring frost (32°F) comes after May 8 in half of years and after May 24 in one year in ten; the first autumn frost comes before October 13 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
- May 81 year in 10 after May 24; 9 in 10 after April 23
- First autumn frost, half of years before
- October 131 year in 10 before October 1; 9 in 10 before October 27
NOAA puts the median frost-free season at 157 days, and the season without a hard freeze (28°F) at 180 days.
A hard freeze (28°F) comes after April 27 in half of springs and before October 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Indiana in zone 6b in ZIP code 15705, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Indiana's NOAA station is in zone 6a: the coldest night of a typical year reaches −5°F (26 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 Pennsylvania · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00364214; 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 Indiana?
In a normal year in Indiana, 8 days a year reach 90°F, 131 nights fall to 32°F or colder and 167 days bring measurable precipitation.
- Days at 90°F or more
- 8a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 131a normal year
- Days that stay below freezing
- 32high of 32°F or less
- Days with 0.01 inch of precipitation
- 167a normal year
- Days with 1 inch of snow or more
- 20a normal year
The highest temperature in this station's record (since 1946) is 99°F, on August 17, 1988; the lowest is −26°F, on February 2, 1961.
The wettest calendar year on that record is 2018, with 68.56 in; the snowiest season is 1977–78, with 107.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00364214; records: ACIS (NOAA Regional Climate Centers), station USC00364214. Records use complete months only; a month missing more than three days is left out.
How sunny is Indiana?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Indiana, 3.7 kWh per square metre a day. August is the sunniest month (76%) and December the cloudiest (51%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 53% | 1.6 |
| February | 58% | 2.4 |
| March | 61% | 3.4 |
| April | 66% | 4.6 |
| May | 69% | 5.3 |
| June | 73% | 5.9 |
| July | 76% | 5.9 |
| August | 76% | 5.3 |
| September | 75% | 4.3 |
| October | 66% | 2.9 |
| November | 65% | 2.0 |
| December | 51% | 1.3 |
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 Indiana need?
A normal year in Indiana brings 6,147 heating degree days, 14% more than the median U.S. place (5,373), and 528 cooling degree days, 42% fewer 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 2,703 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,187 | 0 |
| February | 1,014 | 0 |
| March | 865 | 0 |
| April | 503 | 2 |
| May | 223 | 29 |
| June | 53 | 99 |
| July | 9 | 184 |
| August | 16 | 153 |
| September | 114 | 54 |
| October | 414 | 7 |
| November | 735 | 0 |
| December | 1,014 | 0 |
| Year (annual) | 6,147 | 528 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00364214. 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 Indiana been warmer than normal lately?
2024 averaged 51.8°F, 2.3°F above the 1991-2020 normal of 49.5°F. 2 of the 3 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 49.0°F | −0.5°F | 56.14 | 37.3 |
| 2023 | 50.7°F | +1.2°F | 45.83 | 13.0 |
| 2024 | 51.8°F | +2.3°F | 52.21 | 26.0 |
Over 68 complete years from 1947 to 2024, the station's annual mean temperature rose at a fitted 3.0°F per century (+0.17°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00364214; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Indiana's climate compare?
Indiana is warmer than 39 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 84. Across the 7,247 U.S. stations with normals, its annual mean of 49.5°F is warmer than 38%.
In the Köppen classification computed from these normals, Indiana is Dfb: continental, no dry season, warm 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 Indiana share this climate record?
17 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.
- Homer City, PA1,725 people · 4 mi SW
- Clymer, PA1,317 people · 7 mi NE
- Chevy Chase Heights, PA1,094 people · 3 mi NW
- Black Lick, PA1,008 people · 10 mi S
- Lucerne Mines, PA764 people · 3 mi SW
- Dixonville, PA689 people · 10 mi NE
- Jacksonville, PA548 people · 10 mi W
- Robinson, PA509 people · 13 mi S
- Ernest, PA420 people · 6 mi NW
- Marion Center, PA405 people · 13 mi N
- Creekside, PA285 people · 7 mi NW
- Heilwood, PA229 people · 11 mi E
- Coral, PA206 people · 7 mi SW
- Commodore, PA184 people · 13 mi NE
- Armagh, PA101 people · 11 mi SE
- Graceton, PA100 people · 7 mi SW
- Shelocta, PA99 people · 10 mi NW
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 Indiana's climate
What is the coldest month in Indiana?
January, with a normal high of 36°F and a normal low of 18°F. The warmest is July (83°F by day, 59°F at night).
Does it snow in Indiana?
Yes: 46 inches in a normal year, falling on 32 days with 0.1 inch or more, the most in January (13.3 inches).
What is the rainiest month in Indiana?
July, with 5.13 in of precipitation in a normal year; the driest is February with 2.95 in.
What plant hardiness zone is Indiana in?
The USDA's 2023 map puts Indiana in zone 6b in ZIP code 15705, the nearest ZIP area. By the same method at Indiana's NOAA station, the coldest night of a typical year reaches −5°F (26 years, 1991-2020): zone 6a.
How late can frost come in Indiana?
In half of years the last 32°F night comes after May 8; in one year in ten it comes after May 24. Waiting until May 24 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Indiana in OctoberThis month day by day, its records and recent years
- Pennsylvania climateThe statewide normals and every place in the state
- Loyalhanna, PA20 miles from this station, 50.0°F a year
- Ford City, PA22 miles from this station, 49.6°F a year
- Ebensburg, PA22 miles from this station, 46.6°F a year
- Salina (3 mi W), PA23 miles from this station, 50.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made