The year at a glance
Averages from 30 years of climate history, 1991-2020
| Herndon | Metric | Houston |
|---|---|---|
| 205 days | Sunny daysclear or partly cloudy skies | 215 days |
| 42 in | Precipitationper year | 52 in |
| 119 days | Wet daysrain or snow per year | 104 days |
| 21 in | Snowfallper year | 0 in |
| 29 days | Hot daysabove 90 °F | 107 days |
| 106 days | Freezing nightsat or below 32 °F | 5 days |
| 69% | Humidityaverage relative | 75% |
| 55 °F | Average temperatureyear round | 71 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Herndon high | 42 | 46 | 54 | 66 | 74 | 82 | 87 | 86 | 79 | 67 | 56 | 46 |
| Houston high | 63 | 67 | 73 | 79 | 86 | 91 | 93 | 94 | 90 | 82 | 72 | 65 |
| Herndon low | 25 | 26 | 33 | 43 | 53 | 62 | 67 | 65 | 58 | 45 | 35 | 29 |
| Houston low | 45 | 49 | 54 | 61 | 69 | 75 | 77 | 77 | 72 | 63 | 53 | 46 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Herndon | 3.0 | 2.8 | 3.8 | 3.4 | 3.8 | 3.4 | 3.9 | 3.3 | 4.3 | 3.4 | 3.0 | 3.5 |
| Houston | 4.5 | 3.6 | 3.9 | 4.3 | 4.1 | 4.9 | 3.8 | 4.1 | 4.9 | 4.6 | 4.5 | 4.7 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Herndon | 16 | 15 | 16 | 16 | 16 | 17 | 19 | 19 | 18 | 20 | 18 | 16 |
| Houston | 15 | 13 | 15 | 16 | 18 | 21 | 21 | 21 | 21 | 22 | 18 | 15 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Herndon vs another city
- Herndon vs Hutchison, VA
- Herndon vs McNair, VA
- Herndon vs Dranesville, VA
- Herndon vs Sterling, VA
- Herndon vs Reston, VA
- Herndon vs Floris, VA
- Herndon vs New York, NY
- Herndon vs Los Angeles, CA
- Herndon vs Chicago, IL
- Herndon vs Phoenix, AZ
- Herndon vs Philadelphia, PA
Houston vs another city
- Houston vs West University Place, TX
- Houston vs Bellaire, TX
- Houston vs Aldine, TX
- Houston vs Jacinto City, TX
- Houston vs Galena Park, TX
- Houston vs Cloverleaf, TX
- Houston vs New York, NY
- Houston vs Los Angeles, CA
- Houston vs Chicago, IL
- Houston vs Phoenix, AZ
- Houston vs Philadelphia, PA
- Houston vs San Antonio, TX
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).