Rockdale, PA climate
Rockdale has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 81°, a January night drops to 18°, and about 114 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Rockdale feels like
Winter
Spring
Summer
Fall
Rockdale 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 | 33° | 18° | 3.5" | 30.3" | 21 | 25 | 16° – 35° |
| February | 36° | 18° | 2.6" | 21.3" | 16 | 23 | 11° – 36° |
| March | 44° | 25° | 3.3" | 15.8" | 15 | 15 | 27° – 48° |
| April | 58° | 35° | 3.8" | 3.8" | 15 | 2 | 41° – 52° |
| May | 70° | 45° | 3.9" | 0 | 13 | 0 | 50° – 64° |
| June | 77° | 54° | 4.6" | 0 | 13 | 0 | 61° – 70° |
| July | 81° | 59° | 4.3" | 0 | 13 | 0 | 65° – 74° |
| August | 80° | 57° | 3.8" | 0 | 12 | 0 | 64° – 73° |
| September | 73° | 51° | 4.2" | 0 | 12 | 0 | 59° – 67° |
| October | 61° | 41° | 4.3" | 0.9" | 15 | 0 | 47° – 57° |
| November | 48° | 32° | 3.6" | 14.5" | 16 | 7 | 34° – 47° |
| December | 38° | 24° | 3.8" | 27.6" | 18 | 18 | 21° – 42° |
| Year | 58° | 38° | 45.7" | 114.2" | 178 | 90 |
“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 Rockdale
Rockdale gets 46 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 178 days a year. Snow covers the ground about 90 days of the year.
About 155 frost-free days a year
In half of years the last 32° night comes by May 7 and the first one by October 10. That leaves about 155 frost-free days for gardens, shorter than 76% of U.S. towns.
Heating and cooling a home in Rockdale
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rockdale, 94% of that work is heating and 6% 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.
Rockdale and its neighbors
Rockdale borders 5 towns with climate data. January nights across them vary by 0.8°. Bloomfield has the coldest January nights (17°) and Athens the hottest July afternoons (81°). Rockdale’s January low is 18° and its July high 81°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Rockdale 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 Rockdale averaged 1.6° warmer than the 1900s. The biggest change is in December (+2.8°). The shift is larger than in 78% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rockdale’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 11° to 36°. September is the most reliable, staying within 8°.
Common questions about Rockdale’s climate
What is the coldest month in Rockdale?
January, with a typical high of 33° and a low of 18°.
What is the hottest month in Rockdale?
July, with a typical high of 81° and a low of 59°.
How much snow does Rockdale get?
About 114 inches in a normal winter, most of it in January.
When is the first frost in Rockdale?
In half of years the first 32° night comes by October 10, and the last spring frost by May 7.
What is the rainiest month in Rockdale?
June, with 4.6 inches of rain and melted snow. The year totals 46 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rockdale itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Union City Filtration Plant, PA (8 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.