30-year climate normals
La Salle County Climate and Weather Averages
Hottest month: August
100.3°average daily high. The coldest month is January, averaging a low of 43.9°F.
La Salle County gets 21.68" of precipitation a year, and 34% of it falls in May, Jun, Jul.
Temperature through the year
Each bar spans the average daily low to the average daily high for that month.
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| January | 67.4° | 43.9° | 0.85" |
| February | 73.6° | 48.3° | 1.26" |
| March | 79.7° | 54.8° | 1.57" |
| April | 86.0° | 60.7° | 1.33" |
| May | 92.8° | 68.6° | 3.01" |
| June | 97.9° | 73.6° | 2.20" |
| July | 99.2° | 74.7° | 2.26" |
| August | 100.3° | 75.0° | 1.67" |
| September | 93.9° | 70.8° | 2.98" |
| October | 86.6° | 62.8° | 2.39" |
| November | 75.7° | 52.4° | 1.15" |
| December | 68.7° | 44.9° | 1.01" |
Rainfall by month
Precipitation is spread fairly evenly through the year here, with 34% falling in the wettest three months (May, Jun, Jul).
What this climate costs you
Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.
These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in La Salle County, where electricity is one line of eight.
Common questions
What is the weather like in La Salle County?
La Salle County averages a high of 100.3°F in August and a low of 43.9°F in January. Annual precipitation is 21.68 inches, with essentially no snow.
When is the rainy season in La Salle County?
The wettest stretch is May, Jun, Jul, which accounts for 34% of the year's precipitation. Precipitation is relatively evenly distributed across the year.
How hot does it get in La Salle County?
The average daily high in August, the hottest month, is 100.3°F. That drives 3,951 cooling degree days a year, which is what your air conditioning has to work against.
Does it snow in La Salle County?
The weather station used for La Salle County, COTULLA LA SALLE CO AP, TX US, reports temperature and precipitation but not snowfall, so there is no snow normal to quote here. Precipitation that falls as snow is still counted in the 21.68 inches above, measured as melted water.
Sources
- Temperature, precipitation and snowfall normals: NOAA National Centers for Environmental Information, 1991 to 2020 Monthly Climate Normals, station COTULLA LA SALLE CO AP, TX US (USW00012947), 10.4 miles from the county centroid.
- Heating and cooling degree days: NOAA, same station and period.
- Annual figures on this page are the sum of that station's twelve monthly normals. NOAA also publishes a separately-computed annual normal, which can differ from the monthly sum by a few percent; we use the monthly series because the month-by-month breakdown above has to come from it.
- Electricity price: US Energy Information Administration, Electric Power Monthly Table 5.6.A, Texas residential average.
- Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.