Westfield, Indiana climate: NOAA's gridded normals for the city, beside the nearest station records
NOAA's gridded 1991-2020 normals put Westfield's center at January lows of 19°F and July highs of 84°F, a yearly mean of 51.7°F and 42.3 inches of precipitation. No NOAA station keeps a record under the city's name. The nearest station record, Carmel (7 miles SE, 752 ft), has January lows of 19°F and July highs of 84°F.
62,994 people (Census Bureau 2024). Distances and directions are from the city's center.
- Jan 35° 19°
- Feb 39° 22°
- Mar 50° 31°
- Apr 62° 41°
- May 73° 51°
- Jun 81° 61°
- Jul 84° 64°
- Aug 82° 62°
- Sep 77° 54°
- Oct 65° 43°
- Nov 51° 33°
- Dec 39° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
The months above are NOAA's gridded normals at Westfield's center.
What is each month like in Westfield?
NOAA's grid estimates the normals every 5 km or so from the stations around each point, terrain included. It smooths between stations, so night lows at the heart of a large city can run warmer than the grid shows: at five big-city airports we compared, the grid's highs were within about 1°F of the station and its lows 1-6°F cooler. The nearest record's high and low are beside each month.
| Month | High | Low | Mean | Precip. | Carmel high | Carmel low |
|---|---|---|---|---|---|---|
| January | 35°F | 19°F | 26.7°F | 2.83 | 35°F | 19°F |
| February | 39°F | 22°F | 30.6°F | 2.34 | 39°F | 21°F |
| March | 50°F | 31°F | 40.2°F | 3.17 | 49°F | 30°F |
| April | 62°F | 41°F | 51.5°F | 4.23 | 62°F | 41°F |
| May | 73°F | 51°F | 61.8°F | 4.58 | 72°F | 51°F |
| June | 81°F | 61°F | 70.8°F | 5.07 | 81°F | 61°F |
| July | 84°F | 64°F | 73.7°F | 4.09 | 84°F | 64°F |
| August | 82°F | 62°F | 72.0°F | 3.38 | 83°F | 62°F |
| September | 77°F | 54°F | 65.5°F | 3.28 | 77°F | 55°F |
| October | 65°F | 43°F | 53.9°F | 3.15 | 65°F | 43°F |
| November | 51°F | 33°F | 41.7°F | 3.42 | 51°F | 33°F |
| December | 39°F | 24°F | 31.5°F | 2.76 | 39°F | 24°F |
In metric: a yearly mean of 10.9°C, January lows of −7°C, July highs of 29°C and 1,075 mm of precipitation a year.
Source: NOAA NCEI U.S. Monthly Gridded Climate Normals 1991-2020 (nClimGrid, accession 0245564); NOAA NCEI 1991-2020 station normals. The grid cell holding the city's Census center point.
What do the station records around Westfield say?
Each row is a NOAA station's own 1991-2020 normals, with the snow and frost dates the grid does not give. A record downhill or nearer the coast than the city can run warmer, one uphill cooler: compare the elevations.
| Record | Where | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Carmel3 mi E | 7 mi SE | 752 ft | 51.6°F | 19°F | 84°F | 44.4 | – | April 21 |
| Whitestown | 11 mi W | 941 ft | 51.9°F | 20°F | 83°F | 41.3 | 22 | April 21 |
| Castleton (2 mi S) | 12 mi SE | 824 ft | 52.7°F | 20°F | 85°F | 47.2 | 27 | April 18 |
Source: NOAA NCEI 1991-2020 U.S. Climate Normals; place center and population: Census Bureau 2024. Last frost: the median last spring date of 32°F.
How much snow, how late a frost, what zone and how much sun in Westfield?
NOAA's grid gives no snow, frost dates or records, so these come from the nearest station record, Carmel (7 miles SE, 752 ft). NOAA publishes no snowfall normal for it; the nearest record that has one, Whitestown (11 miles W), gets 22 inches a year. The last spring frost (32°F) comes after April 21 in half of years and the first autumn frost before October 21.
The USDA's 2023 Plant Hardiness Zone Map puts Westfield in zone 6a across its 2 ZIP code areas.
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area (4.0 kWh per square metre a day, NASA POWER 2001-2020); August is the sunniest month (81%) and December the cloudiest (59%).
Carmel's page has its months, frost probabilities, records by month and recent years. NOAA's grid has monthly figures only, so there are no day-by-day month pages for Westfield; the nearest record's month pages have them.
Source: NOAA NCEI 1991-2020 normals, station USC00121303; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; sunshine: NASA POWER.
How does the climate vary across Westfield, ZIP code by ZIP code?
2 ZIP code areas lie wholly or partly in Westfield. On NOAA's grid 46033 is the warmest (52.1°F a year) and 46074 the coolest (51.6°F), a spread of 0.5°F. Each row also names the nearest station record and its frost dates.
Source: Census Bureau 2020 ZCTA-to-place relationship file and ZCTA centers; NOAA NCEI gridded and station normals, 1991-2020. A ZIP area counts when at least a tenth of its land (and 0.5 km²) is in the city; its figures are the grid cell at its center; frost dates are the nearest record's medians of 32°F.