North Potomac and Rockville have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| North Potomac | Metric | Rockville |
|---|---|---|
| 205 days | Sunny daysclear or partly cloudy skies | 205 days |
| 43 in | Precipitationper year | 43 in |
| 119 days | Wet daysrain or snow per year | 119 days |
| 25 in | Snowfallper year | 22 in |
| 24 days | Hot daysabove 90 °F | 23 days |
| 88 days | Freezing nightsat or below 32 °F | 86 days |
| 69% | Humidityaverage relative | 69% |
| 56 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| North Potomac high | 42 | 45 | 54 | 66 | 74 | 82 | 87 | 85 | 78 | 66 | 55 | 46 |
| Rockville high | 42 | 45 | 54 | 66 | 74 | 82 | 87 | 85 | 78 | 66 | 56 | 46 |
| North Potomac low | 26 | 28 | 35 | 45 | 55 | 63 | 68 | 67 | 60 | 48 | 38 | 31 |
| Rockville low | 27 | 28 | 36 | 46 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| North Potomac | 3.1 | 2.9 | 3.9 | 3.4 | 3.9 | 3.6 | 4.1 | 3.6 | 4.5 | 3.5 | 3.0 | 3.5 |
| Rockville | 3.1 | 2.9 | 3.9 | 3.4 | 3.9 | 3.6 | 4.1 | 3.6 | 4.5 | 3.5 | 3.0 | 3.5 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| North Potomac | 16 | 15 | 16 | 16 | 16 | 17 | 19 | 19 | 18 | 20 | 18 | 16 |
| Rockville | 16 | 15 | 16 | 16 | 16 | 17 | 19 | 19 | 18 | 20 | 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.
North Potomac vs another city
- North Potomac vs Travilah, MD
- North Potomac vs Darnestown, MD
- North Potomac vs Gaithersburg, MD
- North Potomac vs Germantown, MD
- North Potomac vs Redland, MD
- North Potomac vs New York, NY
- North Potomac vs Los Angeles, CA
- North Potomac vs Chicago, IL
- North Potomac vs Houston, TX
- North Potomac vs Phoenix, AZ
- North Potomac vs Philadelphia, PA
Rockville vs another city
- Rockville vs Redland, MD
- Rockville vs North Bethesda, MD
- Rockville vs Aspen Hill, MD
- Rockville vs Leisure World, MD
- Rockville vs Gaithersburg, MD
- Rockville vs New York, NY
- Rockville vs Los Angeles, CA
- Rockville vs Chicago, IL
- Rockville vs Houston, TX
- Rockville vs Phoenix, AZ
- Rockville 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).