Rosharon, TX climate
Rosharon has warm winters and hot summers, with plenty of rain. A typical July afternoon reaches 92°, a January night drops to 45°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Rosharon feels like
Winter
Spring
Summer
Fall
Rosharon 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 | 64° | 45° | 4.1" | 0 | 9 | 0 | 49° – 61° |
| February | 68° | 49° | 2.8" | 0 | 8 | 0 | 50° – 67° |
| March | 73° | 55° | 3.2" | 0 | 7 | 0 | 58° – 71° |
| April | 79° | 60° | 3.7" | 0 | 7 | 0 | 65° – 73° |
| May | 85° | 68° | 4.8" | 0 | 6 | 0 | 73° – 80° |
| June | 90° | 73° | 5.2" | 0 | 8 | 0 | 79° – 84° |
| July | 92° | 75° | 4.1" | 0 | 8 | 0 | 81° – 86° |
| August | 93° | 75° | 5.0" | 0 | 8 | 0 | 80° – 88° |
| September | 89° | 71° | 5.7" | 0 | 8 | 0 | 77° – 84° |
| October | 82° | 62° | 4.9" | 0 | 6 | 0 | 68° – 77° |
| November | 73° | 53° | 4.2" | 0 | 7 | 0 | 57° – 68° |
| December | 66° | 47° | 4.0" | 0.1" | 8 | 0 | 50° – 61° |
| Year | 80° | 61° | 51.6" | 0.1" | 87 | 0 |
“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 Rosharon
Rosharon gets 52 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 87 days a year.
About 301 frost-free days a year
In half of years the last 32° night comes by February 13 and the first one by December 8. That leaves about 301 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in Rosharon
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rosharon, 26% of that work is heating and 74% is cooling, so air conditioning is the bigger bill.
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.
Rosharon and its neighbors
Rosharon borders 1 town with climate data. January nights across them vary by 0.1°. Alvin has both the coldest January nights (45°) and the hottest July afternoons (92°). Rosharon’s January low is 45° and its July high 92°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Rosharon 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 Rosharon averaged 1.5° warmer than the 1900s. The biggest change is in February (+2.8°). The shift is larger than in 72% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rosharon’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 50° to 67°. July is the most reliable, staying within 5°.
Common questions about Rosharon’s climate
What is the coldest month in Rosharon?
January, with a typical high of 64° and a low of 45°.
What is the hottest month in Rosharon?
August, with a typical high of 93° and a low of 75°. About 94 days a year reach 90°.
How much snow does Rosharon get?
Almost none. A normal year brings 0.1 inches.
When is the first frost in Rosharon?
In half of years the first 32° night comes by December 8, and the last spring frost by February 13.
What is the rainiest month in Rosharon?
September, with 5.7 inches of rain and melted snow. The year totals 52 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rosharon itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Thompsons 3 Wsw, TX (14 mi, snow) and Angleton Brazoria Airport, TX (17 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.