MD
Ashton-Sandy Spring and Olney have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Ashton-Sandy Spring | Metric | Olney |
|---|---|---|
| 204 days | Sunny daysclear or partly cloudy skies | 204 days |
| 43 in | Precipitationper year | 43 in |
| 119 days | Wet daysrain or snow per year | 119 days |
| 24 in | Snowfallper year | 25 in |
| 31 days | Hot daysabove 90 °F | 26 days |
| 88 days | Freezing nightsat or below 32 °F | 86 days |
| 69% | Humidityaverage relative | 68% |
| 57 °F | Average temperatureyear round | 56 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ashton-Sandy Spring high | 43 | 46 | 54 | 66 | 75 | 83 | 88 | 86 | 79 | 68 | 57 | 47 |
| Olney high | 42 | 45 | 54 | 66 | 74 | 83 | 87 | 85 | 78 | 67 | 56 | 46 |
| Ashton-Sandy Spring low | 26 | 28 | 35 | 45 | 55 | 64 | 69 | 67 | 60 | 48 | 38 | 31 |
| Olney low | 27 | 28 | 35 | 45 | 55 | 64 | 69 | 67 | 60 | 48 | 38 | 31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ashton-Sandy Spring | 3.1 | 2.9 | 3.9 | 3.4 | 3.8 | 3.7 | 4.1 | 3.6 | 4.5 | 3.5 | 3.0 | 3.6 |
| Olney | 3.1 | 2.9 | 3.9 | 3.4 | 3.8 | 3.7 | 4.1 | 3.6 | 4.5 | 3.5 | 3.0 | 3.6 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ashton-Sandy Spring | 16 | 15 | 16 | 16 | 16 | 17 | 19 | 19 | 18 | 19 | 18 | 16 |
| Olney | 16 | 15 | 16 | 16 | 16 | 17 | 19 | 19 | 18 | 19 | 18 | 16 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Ashton-Sandy Spring vs another city
- Ashton-Sandy Spring vs Cloverly, MD
- Ashton-Sandy Spring vs Burtonsville, MD
- Ashton-Sandy Spring vs Layhill, MD
- Ashton-Sandy Spring vs Fulton, MD
- Ashton-Sandy Spring vs Leisure World, MD
- Ashton-Sandy Spring vs New York, NY
- Ashton-Sandy Spring vs Los Angeles, CA
- Ashton-Sandy Spring vs Chicago, IL
- Ashton-Sandy Spring vs Houston, TX
- Ashton-Sandy Spring vs Phoenix, AZ
- Ashton-Sandy Spring vs Philadelphia, PA
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).