Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mason enjoys a temperate climate with an average annual temperature of 66°F (19°C). Winters average 47°F in January while summers reach 83°F in July. The area gets 328 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 28.9 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 1,528 feet.
Temperature
47°F Jan (9°C)83°F Jul (28°C)
Annual Average
66.0°F
22% above US avg
January Average
47°F (9°C)
July Average
83°F (28°C)
Sunny Days
328 days/yr
Geography
Elevation
1,528 ft (466 m)
Area
3.7 sq mi (9.5 km²)
Population Density
546/sq mi
Coordinates
30.7477°N, 99.2286°W
Timezone
America/Chicago
County
Mason County County
Nearest Airport
Brownwood Regional (BWD) 74 miles away
Precipitation & Snow
Annual Rainfall28.9"
24% below US avg
Wettest Month (May)3.62"
Driest Month (Jan)1.10"
Air Quality
AQI Median
42.0
Rating
Good
Natural Hazard Risk
Overall Risk
Very Low
Risk Score
11.0 / 100
Social Vulnerability
91.9 / 100
Community Resilience
48.1 / 100
Hazard Breakdown
Tornado
Very Low
Hurricane
Very Low
Earthquake
Very Low
Wildfire
Relatively Low
Flood
Very Low
Hail
Relatively Low
Strong Wind
Very Low
Heat Wave
Very Low
Winter Weather
Relatively Low
Lightning
Relatively Low
Ice Storm
Very Low
Drought
Relatively Moderate
Cold Wave
Very Low
Landslide
Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990.
Strongest on record: M2.9.
Sep 3, 2015
7 km NNE of Leander, Texas
M2.9
134 km
5 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
1 hurricane (Category 1+) recorded within 500 km since 1980.
Strongest on record: Category 1.
Year
Name
Category
Max Wind
Closest
2017
Harvey
Category 3
121 mph
294 km
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
165 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF4. Total: 1 fatality, 81 injuries.
Date
Rating
Distance
Path
Fatalities
May 11, 1999
EF4
14 km
7.0 mi
1
Oct 12, 2001
EF3
77 km
2.5 mi
0
May 11, 1999
EF3
50 km
3.5 mi
0
May 13, 1994
EF3
94 km
3.5 mi
0
Mar 2, 1979
EF3
15 km
7.1 mi
0
May 30, 1976
EF3
57 km
3.6 mi
0
Mar 10, 1973
EF3
96 km
7.8 mi
0
May 6, 1969
EF3
31 km
41.6 mi
0
May 6, 1969
EF3
95 km
38.9 mi
0
May 2, 2024
EF2
92 km
6.1 mi
0
Jan 15, 2017
EF2
37 km
2.0 mi
0
May 28, 2016
EF2
45 km
4.8 mi
0
Mar 12, 1999
EF2
40 km
8.0 mi
0
Mar 12, 1999
EF2
28 km
2.0 mi
0
May 7, 1995
EF2
97 km
2.0 mi
0
May 7, 1995
EF2
59 km
2.0 mi
0
May 17, 1989
EF2
56 km
2.0 mi
0
May 14, 1989
EF2
44 km
1.0 mi
0
May 15, 1981
EF2
55 km
8.0 mi
0
Mar 30, 1976
EF2
96 km
15.2 mi
0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km.
Largest: SAN SABA FIRE (12,896 acres, 1993).
Year
Name
Acres Burned
Distance
1993
SAN SABA FIRE
12,896
49 km
2020
GATE 5
11,457
72 km
1993
MENARD FIRE
10,463
76 km
2015
EATON CEMETERY
10,441
22 km
2020
MAYS
9,736
48 km
2011
OASIS
7,919
76 km
1999
WILLIAMS RANCH FIRE
6,226
57 km
2003
UNNAMED
4,490
51 km
1996
UNNAMED
3,951
93 km
2011
JAMES RIVER ROAD
3,918
21 km
1984
STEWAIT
3,696
89 km
2020
BUFFALO CREEK
3,630
89 km
2015
LOG CABIN
3,391
40 km
2022
NETHERY ROAD
3,391
89 km
2008
GARVEN STORE COMPLEX
3,379
91 km
2005
UNNAMED
3,133
48 km
2000
UNNAMED
2,928
39 km
2011
UNNAMED
2,719
87 km
2011
UNNAMED
2,654
88 km
2007
ART
2,623
13 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
47°F (9°C)
1.1 in
Coldest, Driest
February
50°F (10°C)
1.6 in
March
57°F (14°C)
1.5 in
April
64°F (18°C)
2.1 in
May
72°F (22°C)
3.6 in
Wettest
June
78°F (26°C)
3.1 in
July
83°F (28°C)
1.9 in
Warmest
August
81°F (27°C)
2.6 in
September
77°F (25°C)
3.2 in
October
67°F (20°C)
2.9 in
November
57°F (14°C)
1.5 in
December
49°F (9°C)
1.1 in
Mason has a seasonal temperature swing of 36°F / from 47°F in January to 83°F in July. Total annual precipitation is 26.4 inches, with May being the wettest month (3.6") and January the driest (1.1").
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