Marion, Indiana climate: Normal weather by month, frost dates and records
Marion's normal year runs from 18°F January nights to 84°F July afternoons, with 41.8 inches of precipitation and 25 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.2°C, January lows of −8°C, July highs of 29°C, 1,061 mm of precipitation a year.
- NOAA stationMarion (2 mi N)
- Station IDUSC00125337
- Location40.58°N 85.66°W
- Elevation790 ft (241 m)
- Population28,216
On October 22, the normal high in Marion is 61°F and the normal low 40°F, and the chance of measurable rain or snow is 31%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Marion.
- Jan 33° 18°
- Feb 37° 20°
- Mar 48° 28°
- Apr 61° 38°
- May 72° 49°
- Jun 81° 59°
- Jul 84° 63°
- Aug 82° 61°
- Sep 77° 53°
- Oct 64° 42°
- Nov 50° 32°
- Dec 38° 23°
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 Marion each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 18°F. The most precipitation falls in May (4.76 in), the least in February (2.15 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 | 33°F | 18°F | 25.4°F | 2.85 | 8.1 | 12 | <1 | 27 | 9 h 30 min |
| February | 37°F | 20°F | 28.2°F | 2.15 | 6.3 | 9 | <1 | 24 | 10 h 40 min |
| March | 48°F | 28°F | 38.0°F | 2.87 | 3.7 | 10 | <1 | 21 | 11 h 50 min |
| April | 61°F | 38°F | 49.6°F | 4.10 | 0.3 | 12 | <1 | 8 | 13 h 10 min |
| May | 72°F | 49°F | 60.6°F | 4.76 | 0.0 | 13 | 1 | 1 | 14 h 20 min |
| June | 81°F | 59°F | 70.0°F | 4.42 | 0.0 | 11 | 4 | <1 | 15 h |
| July | 84°F | 63°F | 73.2°F | 4.33 | 0.0 | 10 | 5 | <1 | 14 h 50 min |
| August | 82°F | 61°F | 71.3°F | 3.93 | 0.0 | 9 | 3 | <1 | 13 h 50 min |
| September | 77°F | 53°F | 64.9°F | 3.39 | 0.0 | 8 | 1 | <1 | 12 h 30 min |
| October | 64°F | 42°F | 53.0°F | 3.12 | 0.1 | 10 | <1 | 4 | 11 h 10 min |
| November | 50°F | 32°F | 40.7°F | 3.26 | 1.0 | 10 | <1 | 17 | 10 h |
| December | 38°F | 23°F | 30.5°F | 2.58 | 5.0 | 10 | <1 | 25 | 9 h 20 min |
| Year (annual) | 61°F | 40°F | 50.4°F | 41.76 | 24.5 | 123 | 14 | 126 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −8°C | −3.7°C | 72 mm | 21 cm |
| February | 3°C | −7°C | −2.1°C | 55 mm | 16 cm |
| March | 9°C | −2°C | 3.3°C | 73 mm | 9 cm |
| April | 16°C | 3°C | 9.8°C | 104 mm | 1 cm |
| May | 22°C | 10°C | 15.9°C | 121 mm | 0 cm |
| June | 27°C | 15°C | 21.1°C | 112 mm | 0 cm |
| July | 29°C | 17°C | 22.9°C | 110 mm | 0 cm |
| August | 28°C | 16°C | 21.8°C | 100 mm | 0 cm |
| September | 25°C | 12°C | 18.3°C | 86 mm | 0 cm |
| October | 18°C | 5°C | 11.7°C | 79 mm | 0 cm |
| November | 10°C | 0°C | 4.8°C | 83 mm | 3 cm |
| December | 3°C | −5°C | −0.8°C | 66 mm | 13 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00125337; 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 Marion?
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 (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 USC00125337.
When is the last frost in Marion?
In Marion, the last spring frost (32°F) comes after April 26 in half of years and after May 12 in one year in ten; the first autumn frost comes before October 20 in half of years and before October 5 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 261 year in 10 after May 12; 9 in 10 after April 11
- First autumn frost, half of years before
- October 201 year in 10 before October 5; 9 in 10 before November 1
NOAA puts the median frost-free season at 175 days, and the season without a hard freeze (28°F) at 200 days.
A hard freeze (28°F) comes after April 14 in half of springs and before November 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Marion in zone 6a in ZIP code 46953, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Marion's NOAA station is in zone 6a: the coldest night of a typical year reaches −6°F (24 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 USC00125337; 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 Marion?
In a normal year in Marion, 14 days a year reach 90°F, 126 nights fall to 32°F or colder and 123 days bring measurable precipitation.
- Days at 90°F or more
- 14a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 126a normal year
- Days that stay below freezing
- 39high of 32°F or less
- Days with 0.01 inch of precipitation
- 123a normal year
- Days with 1 inch of snow or more
- 8a normal year
The highest temperature in this station's record (since 1893) is 108°F, on July 14, 1936; the lowest is −23°F, on January 21, 1985.
The wettest calendar year on that record is 1998, with 54.68 in; the snowiest season is 1981–82, with 69.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00125337; records: ACIS (NOAA Regional Climate Centers), station USC00125337. Records use complete months only; a month missing more than three days is left out.
How sunny is Marion?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Marion, 3.9 kWh per square metre a day. August is the sunniest month (81%) and December the cloudiest (57%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 59% | 1.7 |
| February | 64% | 2.6 |
| March | 66% | 3.6 |
| April | 69% | 4.8 |
| May | 71% | 5.5 |
| June | 77% | 6.2 |
| July | 81% | 6.2 |
| August | 81% | 5.5 |
| September | 79% | 4.5 |
| October | 71% | 3.1 |
| November | 67% | 2.1 |
| December | 57% | 1.4 |
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 Marion need?
A normal year in Marion brings 6,079 heating degree days, 13% more than the median U.S. place (5,373), and 813 cooling degree days, 10% 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 3,119 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,229 | 0 |
| February | 1,029 | 0 |
| March | 837 | 1 |
| April | 468 | 6 |
| May | 193 | 56 |
| June | 30 | 180 |
| July | 5 | 257 |
| August | 10 | 204 |
| September | 95 | 94 |
| October | 384 | 14 |
| November | 729 | 0 |
| December | 1,069 | 0 |
| Year (annual) | 6,079 | 813 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00125337. 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 Marion been warmer than normal lately?
2025 averaged 51.6°F, 1.2°F above the 1991-2020 normal of 50.4°F. 3 of the 3 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2023 | 53.3°F | +2.9°F | 38.12 | 11.4 |
| 2024 | 54.1°F | +3.8°F | 41.02 | 11.2 |
| 2025 | 51.6°F | +1.2°F | 33.84 | 22.6 |
Over 110 complete years from 1895 to 2025, the station's annual mean temperature rose at a fitted 0.3°F per century (+0.02°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00125337; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Marion's climate compare?
Marion is warmer than 26 of the other 98 places with their own NOAA record in Indiana, and wetter than 38. Across the 7,247 U.S. stations with normals, its annual mean of 50.4°F is warmer than 42%.
In the Köppen classification computed from these normals, Marion 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 Marion 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.
- Gas City, IN6,091 people · 7 mi SE
- Fairmount, IN2,666 people · 11 mi S
- Jonesboro, IN1,506 people · 7 mi S
- Converse, IN1,125 people · 11 mi W
- Sweetser, IN1,072 people · 6 mi W
- Swayzee, IN905 people · 10 mi SW
- La Fontaine, IN802 people · 7 mi NW
- Van Buren, IN786 people · 9 mi E
- Herbst, IN323 people · 8 mi SW
- Fowlerton, IN273 people · 13 mi S
- Mier, IN142 people · 9 mi W
- Sims, IN117 people · 12 mi SW
- Jalapa, IN68 people · 5 mi NW
- Landess, IN62 people · 6 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 Marion's climate
What is the coldest month in Marion?
January, with a normal high of 33°F and a normal low of 18°F. The warmest is July (84°F by day, 63°F at night).
Does it snow in Marion?
Yes: 25 inches in a normal year, falling on 16 days with 0.1 inch or more, the most in January (8.1 inches).
What is the rainiest month in Marion?
May, with 4.76 in of precipitation in a normal year; the driest is February with 2.15 in.
What plant hardiness zone is Marion in?
The USDA's 2023 map puts Marion in zone 6a in ZIP code 46953, the nearest ZIP area. By the same method at Marion's NOAA station, the coldest night of a typical year reaches −6°F (24 years, 1991-2020): zone 6a.
How late can frost come in Marion?
In half of years the last 32°F night comes after April 26; 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
- Marion in OctoberThis month day by day, its records and recent years
- Indiana climateThe statewide normals and every place in the state
- Wabash, IN17 miles from this station, 51.4°F a year
- Huntington, IN21 miles from this station, 50.1°F a year
- Hartford City, IN22 miles from this station, 51.3°F a year
- Elwood, IN22 miles from this station, 51.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made