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Weather & Climate in Harper, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Harper enjoys a temperate climate with an average annual temperature of 65°F (18°C). Winters average 47°F in January while summers reach 81°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 28.3 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 2,182 feet.
Temperature
47°F Jan (9°C)
81°F Jul (27°C)
| Annual Average | 64.8°F |
| 20% above US avg | |
| January Average | 47°F (9°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 328 days/yr |
Geography
| Elevation | 2,182 ft (665 m) |
| Area | 56.7 sq mi (146.7 km²) |
| Population Density | 21/sq mi |
| Coordinates | 30.2661°N, 99.2726°W |
| Timezone | America/Chicago |
| County | Kerr County County |
| Nearest Airport | San Antonio International (SAT) 70 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 77.2 / 100 |
| Social Vulnerability | 86.2 / 100 |
| Community Resilience | 32.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Very Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively 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 | 145 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
2 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2017 | Harvey | Category 4 | 132 mph | 258 km |
| 2003 | Claudette | Category 1 | 92 mph | 295 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
135 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 3 fatalities, 59 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 11, 1999 | EF4 | 49 km | 7.0 mi | 1 |
| Apr 28, 1953 | EF4 | 95 km | 1.0 mi | 2 |
| Oct 12, 2001 | EF3 | 58 km | 2.5 mi | 0 |
| May 11, 1999 | EF3 | 8 km | 3.5 mi | 0 |
| Mar 2, 1979 | EF3 | 57 km | 7.1 mi | 0 |
| May 6, 1969 | EF3 | 47 km | 41.6 mi | 0 |
| May 6, 1969 | EF3 | 69 km | 38.9 mi | 0 |
| Jan 15, 2017 | EF2 | 91 km | 2.0 mi | 0 |
| May 28, 2016 | EF2 | 24 km | 4.8 mi | 0 |
| Mar 12, 1999 | EF2 | 92 km | 8.0 mi | 0 |
| Mar 12, 1999 | EF2 | 82 km | 2.0 mi | 0 |
| Sep 15, 1996 | EF2 | 86 km | 4.0 mi | 0 |
| May 7, 1995 | EF2 | 55 km | 2.0 mi | 0 |
| May 7, 1995 | EF2 | 7 km | 2.0 mi | 0 |
| May 17, 1989 | EF2 | 40 km | 2.0 mi | 0 |
| May 14, 1989 | EF2 | 96 km | 1.0 mi | 0 |
| Mar 4, 1983 | EF2 | 59 km | 4.0 mi | 0 |
| Mar 30, 1976 | EF2 | 51 km | 15.2 mi | 0 |
| May 30, 1971 | EF2 | 95 km | 3.3 mi | 0 |
| Feb 25, 1971 | EF2 | 12 km | 0.3 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 | 99 km |
| 2015 | EATON CEMETERY | 10,441 | 68 km |
| 2011 | OASIS | 7,919 | 62 km |
| 2011 | JAMES RIVER ROAD | 3,918 | 33 km |
| 1984 | STEWAIT | 3,696 | 84 km |
| 2015 | LOG CABIN | 3,391 | 90 km |
| 2022 | NETHERY ROAD | 3,391 | 76 km |
| 2008 | GARVEN STORE COMPLEX | 3,379 | 47 km |
| 2000 | UNNAMED | 2,928 | 91 km |
| 2011 | UNNAMED | 2,719 | 71 km |
| 2022 | TRAINING AREA 23 | 2,696 | 94 km |
| 2011 | UNNAMED | 2,654 | 40 km |
| 2007 | ART | 2,623 | 58 km |
| 2011 | MAYNARD CREEK FIRE | 2,374 | 92 km |
| 2014 | HAVELAH | 2,320 | 91 km |
| 2002 | UNNAMED | 2,234 | 100 km |
| 2005 | UNNAMED | 2,183 | 98 km |
| 2011 | DOSS | 1,860 | 13 km |
| 2008 | HAVERLAH FIRE | 1,812 | 86 km |
| 2008 | KERR COUNTY COMPLEX | 1,775 | 16 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 47°F (9°C) | 1.2 in | Coldest, Driest |
| February | 50°F (10°C) | 1.7 in | |
| March | 57°F (14°C) | 1.5 in | |
| April | 64°F (18°C) | 2.3 in | |
| May | 71°F (22°C) | 3.6 in | Wettest |
| June | 77°F (25°C) | 3.0 in | |
| July | 81°F (27°C) | 2.1 in | Warmest |
| August | 80°F (27°C) | 3.0 in | |
| September | 75°F (24°C) | 3.2 in | |
| October | 66°F (19°C) | 3.2 in | |
| November | 56°F (13°C) | 1.7 in | |
| December | 49°F (9°C) | 1.3 in |
Harper has a seasonal temperature swing of 33°F / from 47°F in January to 81°F in July. Total annual precipitation is 27.8 inches, with May being the wettest month (3.6") and January the driest (1.2").