Smithfield, IN climate
Smithfield has chilly winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 17°, and about 30 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Smithfield feels like
Winter
Spring
Summer
Fall
Smithfield weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 31° | 17° | 2.5" | 8.9" | 13 | 15 | 14° – 35° |
| February | 35° | 19° | 2.0" | 10.2" | 11 | 14 | 14° – 37° |
| March | 46° | 27° | 2.4" | 3.6" | 11 | 4 | 27° – 52° |
| April | 60° | 37° | 3.7" | 0.4" | 12 | 0 | 42° – 54° |
| May | 71° | 48° | 4.5" | 0 | 13 | 0 | 53° – 66° |
| June | 80° | 58° | 3.8" | 0 | 11 | 0 | 64° – 72° |
| July | 83° | 61° | 3.6" | 0 | 9 | 0 | 66° – 78° |
| August | 81° | 59° | 3.7" | 0 | 9 | 0 | 66° – 76° |
| September | 75° | 52° | 3.2" | 0 | 9 | 0 | 59° – 67° |
| October | 63° | 42° | 2.9" | 0 | 12 | 0 | 48° – 59° |
| November | 48° | 31° | 3.0" | 1.1" | 10 | 1 | 33° – 46° |
| December | 36° | 22° | 2.4" | 5.3" | 13 | 7 | 16° – 40° |
| Year | 59° | 40° | 37.6" | 29.5" | 134 | 41 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Smithfield
Smithfield gets 38 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 134 days a year. Snow covers the ground about 41 days of the year.
About 171 frost-free days a year
In half of years the last 32° night comes by April 29 and the first one by October 17. That leaves about 171 frost-free days for gardens, shorter than 59% of U.S. towns.
Heating and cooling a home in Smithfield
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Smithfield, 90% of that work is heating and 10% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Smithfield and its neighbors
Smithfield borders 4 towns with climate data. January nights across them vary by 0.5°. Steuben has the coldest January nights (17°) and Franklin the hottest July afternoons (83°). Smithfield’s January low is 17° and its July high 83°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Smithfield compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Smithfield averaged 1.2° warmer than the 1900s. The biggest change is in February (+2.5°). The shift is smaller than in 53% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Smithfield’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 27° to 52°. September is the most reliable, staying within 8°.
Common questions about Smithfield’s climate
What is the coldest month in Smithfield?
January, with a typical high of 31° and a low of 17°.
What is the hottest month in Smithfield?
July, with a typical high of 83° and a low of 61°. About 15 days a year reach 90°.
How much snow does Smithfield get?
About 30 inches in a normal winter, most of it in February.
When is the first frost in Smithfield?
In half of years the first 32° night comes by October 17, and the last spring frost by April 29.
What is the rainiest month in Smithfield?
May, with 4.5 inches of rain and melted snow. The year totals 38 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Smithfield itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Garrett, IN (11 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.