Irondequoit, NY climate
Irondequoit has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 79°, a January night drops to 19°, and about 102 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Irondequoit feels like
Winter
Spring
Summer
Fall
Irondequoit 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° | 19° | 2.5" | 27.4" | 20 | 21 | 15° – 35° |
| February | 34° | 20° | 2.0" | 23.1" | 16 | 19 | 13° – 35° |
| March | 42° | 27° | 2.4" | 17.9" | 15 | 13 | 28° – 47° |
| April | 54° | 37° | 3.0" | 3.0" | 13 | 1 | 39° – 52° |
| May | 66° | 48° | 3.0" | 0.1" | 12 | 0 | 50° – 63° |
| June | 75° | 58° | 3.2" | 0 | 12 | 0 | 63° – 71° |
| July | 79° | 63° | 3.4" | 0 | 11 | 0 | 66° – 75° |
| August | 79° | 62° | 3.1" | 0 | 10 | 0 | 67° – 76° |
| September | 72° | 56° | 3.2" | 0 | 11 | 0 | 60° – 69° |
| October | 60° | 45° | 3.5" | 0.1" | 14 | 0 | 47° – 58° |
| November | 48° | 35° | 2.8" | 8.1" | 15 | 4 | 36° – 48° |
| December | 38° | 26° | 2.7" | 22.3" | 18 | 14 | 23° – 43° |
| Year | 56° | 41° | 34.8" | 102.0" | 168 | 72 |
“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 Irondequoit
Irondequoit gets 35 inches of rain and melted snow a year. October is the wettest month and February the driest. Rain or snow falls on about 168 days a year. Snow covers the ground about 72 days of the year.
About 181 frost-free days a year
In half of years the last 32° night comes by April 24 and the first one by October 25. That leaves about 181 frost-free days for gardens, longer than 54% of U.S. towns.
Heating and cooling a home in Irondequoit
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Irondequoit, 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.
Irondequoit and its neighbors
Irondequoit borders 4 towns with climate data. January nights across them vary by 1.7°. Penfield has the coldest January nights (18°) and Brighton the hottest July afternoons (81°). Irondequoit’s January low is 19° and its July high 79°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Irondequoit 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 Irondequoit averaged 1.7° warmer than the 1900s. The biggest change is in December (+3.2°). The shift is larger than in 79% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Irondequoit’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 13° to 35°. June is the most reliable, staying within 8°.
Common questions about Irondequoit’s climate
What is the coldest month in Irondequoit?
January, with a typical high of 33° and a low of 19°.
What is the hottest month in Irondequoit?
July, with a typical high of 79° and a low of 63°. About 8 days a year reach 90°.
How much snow does Irondequoit get?
About 102 inches in a normal winter, most of it in January.
When is the first frost in Irondequoit?
In half of years the first 32° night comes by October 25, and the last spring frost by April 24.
What is the rainiest month in Irondequoit?
October, with 3.5 inches of rain and melted snow. The year totals 35 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Irondequoit itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Rochester Gtr Intl Airport, NY (8 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.