Petros, TN climate
Petros has chilly winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 83°, a January night drops to 26°, and about 4 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Petros feels like
Winter
Spring
Summer
Fall
Petros 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 | 44° | 26° | 5.6" | 1.8" | 12 | 2 | 27° – 43° |
| February | 48° | 30° | 5.8" | 1.4" | 12 | 1 | 29° – 46° |
| March | 57° | 37° | 5.8" | 0.6" | 12 | 0 | 40° – 57° |
| April | 67° | 45° | 5.6" | 0 | 11 | 0 | 51° – 62° |
| May | 74° | 55° | 4.7" | 0 | 12 | 0 | 59° – 70° |
| June | 80° | 61° | 5.2" | 0 | 12 | 0 | 67° – 74° |
| July | 83° | 65° | 4.9" | 0 | 13 | 0 | 70° – 77° |
| August | 82° | 64° | 4.1" | 0 | 10 | 0 | 69° – 79° |
| September | 77° | 58° | 4.3" | 0 | 8 | 0 | 64° – 74° |
| October | 67° | 48° | 3.9" | 0 | 8 | 0 | 54° – 63° |
| November | 56° | 37° | 5.4" | 0 | 9 | 0 | 41° – 52° |
| December | 47° | 30° | 6.8" | 0.6" | 12 | 0 | 29° – 49° |
| Year | 65° | 46° | 62.0" | 4.4" | 132 | 4 |
“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 Petros
Petros gets 62 inches of rain and melted snow a year. December is the wettest month and October the driest. Rain or snow falls on about 132 days a year.
About 210 frost-free days a year
In half of years the last 32° night comes by April 5 and the first one by November 1. That leaves about 210 frost-free days for gardens, longer than 78% of U.S. towns.
Heating and cooling a home in Petros
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Petros, 73% of that work is heating and 27% is cooling.
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.
How Petros 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 Petros averaged 0.8° warmer than the 1900s. The biggest change is in December (+1.8°). The shift is smaller than in 83% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Petros’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 29° to 49°. July is the most reliable, staying within 7°.
Common questions about Petros’s climate
What is the coldest month in Petros?
January, with a typical high of 44° and a low of 26°.
What is the hottest month in Petros?
July, with a typical high of 83° and a low of 65°. About 39 days a year reach 90°.
How much snow does Petros get?
About 4 inches in a normal winter, most of it in January.
When is the first frost in Petros?
In half of years the first 32° night comes by November 1, and the last spring frost by April 5.
What is the rainiest month in Petros?
December, with 6.8 inches of rain and melted snow. The year totals 62 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Petros itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Oak Ridge Atdd, TN (13 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.