Rockland, ID climate
Rockland has chilly, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 88°, a January night drops to 16°, and about 35 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Rockland feels like
Winter
Spring
Summer
Fall
Rockland 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 | 34° | 16° | 1.6" | 9.4" | 10 | 21 | 16° – 33° |
| February | 38° | 18° | 1.2" | 7.2" | 8 | 15 | 21° – 36° |
| March | 49° | 26° | 1.4" | 3.2" | 8 | 3 | 31° – 43° |
| April | 57° | 31° | 1.6" | 2.5" | 8 | 0 | 39° – 49° |
| May | 67° | 38° | 1.8" | 0.5" | 7 | 0 | 47° – 58° |
| June | 77° | 45° | 1.1" | 0 | 5 | 0 | 55° – 67° |
| July | 88° | 51° | 0.5" | 0 | 3 | 0 | 59° – 75° |
| August | 86° | 50° | 0.7" | 0 | 4 | 0 | 63° – 72° |
| September | 76° | 41° | 1.1" | 0.1" | 4 | 0 | 55° – 62° |
| October | 61° | 32° | 1.2" | 1.1" | 6 | 0 | 38° – 53° |
| November | 45° | 23° | 1.2" | 3.0" | 7 | 3 | 26° – 41° |
| December | 34° | 16° | 1.5" | 7.9" | 10 | 16 | 20° – 30° |
| Year | 59° | 32° | 14.9" | 34.9" | 79 | 59 |
“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 Rockland
Rockland gets 15 inches of rain and melted snow a year. May is the wettest month and July the driest. Rain or snow falls on about 79 days a year. Snow covers the ground about 59 days of the year.
About 125 frost-free days a year
In half of years the last 32° night comes by May 20 and the first one by September 26. That leaves about 125 frost-free days for gardens, shorter than 96% of U.S. towns.
Heating and cooling a home in Rockland
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rockland, 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.
How Rockland 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 Rockland averaged 1.0° warmer than the 1900s. The biggest change is in January (+2.6°). The shift is smaller than in 72% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rockland’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. January swings the most: between 1991 and 2020 its average temperature ranged from 16° to 33°. September is the most reliable, staying within 8°.
Common questions about Rockland’s climate
What is the coldest month in Rockland?
January, with a typical high of 34° and a low of 16°.
What is the hottest month in Rockland?
July, with a typical high of 88° and a low of 51°. About 49 days a year reach 90°.
How much snow does Rockland get?
About 35 inches in a normal winter, most of it in January.
When is the first frost in Rockland?
In half of years the first 32° night comes by September 26, and the last spring frost by May 20.
What is the rainiest month in Rockland?
May, with 1.8 inches of rain and melted snow. The year totals 15 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rockland itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at American Falls 6 Ne, ID (20 mi, snow) and Massacre Rocks Sp, ID (9 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.