Tarentum, PA climate
Tarentum has chilly winters and warm summers. A typical July afternoon reaches 84°, a January night drops to 21°, and about 29 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Tarentum feels like
Winter
Spring
Summer
Fall
Tarentum 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 37° | 21° | 3.1" | 7.1" | 18 | 21° – 38° |
| February | 41° | 22° | 2.5" | 8.2" | 14 | 18° – 40° |
| March | 50° | 29° | 3.2" | 5.5" | 14 | 33° – 51° |
| April | 63° | 39° | 3.5" | 0.3" | 15 | 45° – 56° |
| May | 73° | 48° | 3.9" | 0 | 15 | 54° – 67° |
| June | 81° | 57° | 4.5" | 0 | 14 | 65° – 72° |
| July | 84° | 61° | 4.4" | 0 | 13 | 68° – 77° |
| August | 83° | 60° | 3.7" | 0 | 12 | 67° – 76° |
| September | 77° | 53° | 3.7" | 0 | 12 | 62° – 69° |
| October | 65° | 42° | 3.1" | 0 | 13 | 49° – 59° |
| November | 52° | 33° | 3.0" | 1.8" | 13 | 37° – 48° |
| December | 41° | 26° | 3.2" | 5.7" | 16 | 24° – 45° |
| Year | 62° | 41° | 41.8" | 28.6" | 168 |
“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 Tarentum
Tarentum gets 42 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 168 days a year.
About 199 frost-free days a year
In half of years the last 32° night comes by April 16 and the first one by November 2. That leaves about 199 frost-free days for gardens, longer than 72% of U.S. towns.
Heating and cooling a home in Tarentum
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Tarentum, 88% of that work is heating and 12% 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.
Tarentum and its neighbors
Tarentum borders 7 towns with climate data. January nights across them vary by 1.0°. Harrison has the coldest January nights (20°) and New Kensington the hottest July afternoons (85°). Tarentum’s January low is 21° and its July high 84°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Tarentum 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 Tarentum averaged 1.0° warmer than the 1900s. The biggest change is in December (+2.2°). The shift is smaller than in 66% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Tarentum’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 18° to 40°. June is the most reliable, staying within 7°.
Common questions about Tarentum’s climate
What is the coldest month in Tarentum?
January, with a typical high of 37° and a low of 21°.
What is the hottest month in Tarentum?
July, with a typical high of 84° and a low of 61°. About 14 days a year reach 90°.
How much snow does Tarentum get?
About 29 inches in a normal winter, most of it in February.
When is the first frost in Tarentum?
In half of years the first 32° night comes by November 2, and the last spring frost by April 16.
What is the rainiest month in Tarentum?
June, with 4.5 inches of rain and melted snow. The year totals 42 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Tarentum itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Salina 3 W, PA (13 mi, snow) and Natrona Lock 4, PA (2 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.