Dale City weather in May
In May, Dale City sees average daytime highs of 75°F and overnight lows near 57°F, with 3.7 in of rain across 11.4 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.
Highs climb over the month, from about 71°F in the first days to 79°F by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels dry.
Daylight stretches from about 13 h 36 min at the start of May to 14 h 30 min by month's end. Set against the rest of the year, May is Dale City's 12th-clearest and 8th-windiest month. For the whole year in context, see Dale City's year-round climate.
- Daytime high
- 75°
- 5th warmest
- Overnight low
- 57°
- 8th coldest
- Rainfall
- 3.7 in
- 11.4 wet days
- Daylight
- 14 h 06 min
- 5:03 AM – 7:08 PM
- Cloud cover
- 63%
- 12th clearest
- Wind
- 6 mph
- 8th windiest
- Solar energy
- 5.71 kWh/m²
- Travel score
- 6.5
- out of 10
Dale City is census designated place in Prince William County, Virginia, United States.
- Density
- 1,787/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Highs climb over the month, from about 71°F in the first days to 79°F by the end.
A typical May day in Dale City reaches about 75°F in the afternoon and slips back to 57°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 86°F. Set against its neighbours, May runs about 8°F warmer than April and about 9°F cooler than June.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 72 | 73 | 73 | 73 | 73 | 74 | 74 | 74 | 74 | 75 | 75 | 75 | 76 | 76 | 76 | 77 | 77 | 78 | 78 | 78 | 79 | 79 | 79 | 80 |
| Avg low (°F) | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 55 | 55 | 55 | 55 | 56 | 56 | 56 | 57 | 57 | 57 | 58 | 58 | 58 | 59 | 59 | 59 | 60 | 60 | 60 | 61 | 61 | 62 | 62 | 62 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 71 | 53 |
| 2 | 71 | 53 |
| 3 | 71 | 53 |
| 4 | 71 | 54 |
| 5 | 72 | 54 |
| 6 | 72 | 54 |
| 7 | 72 | 54 |
| 8 | 72 | 55 |
| 9 | 73 | 55 |
| 10 | 73 | 55 |
| 11 | 73 | 55 |
| 12 | 73 | 56 |
| 13 | 74 | 56 |
| 14 | 74 | 56 |
| 15 | 74 | 57 |
| 16 | 74 | 57 |
| 17 | 75 | 57 |
| 18 | 75 | 58 |
| 19 | 75 | 58 |
| 20 | 76 | 58 |
| 21 | 76 | 59 |
| 22 | 76 | 59 |
| 23 | 77 | 59 |
| 24 | 77 | 60 |
| 25 | 78 | 60 |
| 26 | 78 | 60 |
| 27 | 78 | 61 |
| 28 | 79 | 61 |
| 29 | 79 | 62 |
| 30 | 79 | 62 |
| 31 | 80 | 62 |
How May really feels in Dale City
Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Dale City weather by month
How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 43° / 29° | 3.1 | 8.7 | 2.8 | 9.6 | 0.6 |
| Feb | 46° / 31° | 2.8 | 8.5 | 2.5 | 10.5 | 1.4 |
| Mar | 55° / 38° | 3.9 | 10.3 | 1.7 | 11.7 | 3.5 |
| Apr | 66° / 48° | 3.4 | 9.9 | 0 | 13 | 6.0 |
| May | 75° / 57° | 3.7 | 11.4 | 0 | 14.1 | 6.5 |
| Jun | 84° / 66° | 3.5 | 11.4 | 0 | 14.6 | 5.4 |
| Jul | 88° / 71° | 3.8 | 11.7 | 0 | 14.4 | 4.3 |
| Aug | 86° / 69° | 3.5 | 10.1 | 0 | 13.5 | 5.1 |
| Sep | 79° / 62° | 4.3 | 9.4 | 0 | 12.3 | 6.8 |
| Oct | 67° / 51° | 3.4 | 7.9 | 0 | 11 | 6.6 |
| Nov | 56° / 40° | 2.9 | 7.6 | 0.2 | 9.9 | 4.2 |
| Dec | 47° / 33° | 3.4 | 8.9 | 1.6 | 9.3 | 1.6 |
Cloud cover in May
The sky is clear or mostly clear about 25% of the time in May, the cloudiest month of the year.
Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 57%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 43 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 43 | 44 | 44 | 43 | 42 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 42 | 43 | 43 | 43 | 44 | 44 | 44 |
| Cloudier (%) | 57 | 57 | 57 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 57 | 56 | 56 | 57 | 58 | 58 | 58 | 58 | 59 | 59 | 59 | 59 | 58 | 57 | 57 | 57 | 56 | 56 | 56 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 43 | 57 |
| 2 | 43 | 57 |
| 3 | 43 | 57 |
| 4 | 44 | 56 |
| 5 | 44 | 56 |
| 6 | 44 | 56 |
| 7 | 44 | 56 |
| 8 | 44 | 56 |
| 9 | 44 | 56 |
| 10 | 44 | 56 |
| 11 | 44 | 56 |
| 12 | 44 | 56 |
| 13 | 43 | 57 |
| 14 | 44 | 56 |
| 15 | 44 | 56 |
| 16 | 43 | 57 |
| 17 | 42 | 58 |
| 18 | 42 | 58 |
| 19 | 42 | 58 |
| 20 | 42 | 58 |
| 21 | 41 | 59 |
| 22 | 41 | 59 |
| 23 | 41 | 59 |
| 24 | 41 | 59 |
| 25 | 42 | 58 |
| 26 | 43 | 57 |
| 27 | 43 | 57 |
| 28 | 43 | 57 |
| 29 | 44 | 56 |
| 30 | 44 | 56 |
| 31 | 44 | 56 |
Chance of precipitation in May
Dale City gets around 3.7 in of rain over 11.4 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 36% and peaks near 37% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 36 | 36 | 36 | 36 | 35 | 35 | 35 |
| Rain chance (%) | |
|---|---|
| 1 | 36 |
| 2 | 36 |
| 3 | 36 |
| 4 | 36 |
| 5 | 36 |
| 6 | 36 |
| 7 | 36 |
| 8 | 37 |
| 9 | 37 |
| 10 | 37 |
| 11 | 37 |
| 12 | 37 |
| 13 | 37 |
| 14 | 37 |
| 15 | 37 |
| 16 | 37 |
| 17 | 37 |
| 18 | 37 |
| 19 | 37 |
| 20 | 37 |
| 21 | 37 |
| 22 | 37 |
| 23 | 37 |
| 24 | 37 |
| 25 | 36 |
| 26 | 36 |
| 27 | 36 |
| 28 | 36 |
| 29 | 35 |
| 30 | 35 |
| 31 | 35 |
Humidity in May
Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the dry band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 74 | 71 | 69 | 68 | 66 | 66 | 63 | 63 | 62 | 61 | 60 | 59 | 58 | 58 | 58 | 56 | 55 | 54 | 51 | 50 | 48 | 46 | 44 | 43 | 41 | 39 | 38 | 36 | 35 | 33 | 32 |
| Comfortable (%) | 15 | 16 | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 21 | 22 | 22 | 23 | 23 | 23 |
| Humid (%) | 10 | 11 | 12 | 13 | 14 | 14 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Muggy (%) | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 6 | 7 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 16 | 17 | 18 | 18 | 19 | 20 | 21 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 74 | 15 | 10 | 1 | 0 |
| 2 | 71 | 16 | 11 | 2 | 0 |
| 3 | 69 | 17 | 12 | 2 | 0 |
| 4 | 68 | 17 | 13 | 2 | 0 |
| 5 | 66 | 18 | 14 | 2 | 0 |
| 6 | 66 | 18 | 14 | 2 | 0 |
| 7 | 63 | 19 | 15 | 3 | 0 |
| 8 | 63 | 19 | 15 | 3 | 0 |
| 9 | 62 | 19 | 16 | 3 | 0 |
| 10 | 61 | 19 | 16 | 4 | 0 |
| 11 | 60 | 19 | 17 | 4 | 0 |
| 12 | 59 | 19 | 17 | 5 | 0 |
| 13 | 58 | 19 | 17 | 6 | 0 |
| 14 | 58 | 18 | 17 | 7 | 0 |
| 15 | 58 | 18 | 17 | 7 | 0 |
| 16 | 56 | 18 | 18 | 8 | 0 |
| 17 | 55 | 18 | 18 | 9 | 0 |
| 18 | 54 | 18 | 18 | 10 | 0 |
| 19 | 51 | 19 | 19 | 11 | 0 |
| 20 | 50 | 19 | 19 | 12 | 1 |
| 21 | 48 | 19 | 20 | 13 | 1 |
| 22 | 46 | 19 | 20 | 14 | 1 |
| 23 | 44 | 19 | 20 | 15 | 1 |
| 24 | 43 | 20 | 21 | 16 | 1 |
| 25 | 41 | 20 | 21 | 16 | 1 |
| 26 | 39 | 21 | 21 | 17 | 2 |
| 27 | 38 | 22 | 21 | 18 | 2 |
| 28 | 36 | 22 | 21 | 18 | 2 |
| 29 | 35 | 23 | 21 | 19 | 2 |
| 30 | 33 | 23 | 21 | 20 | 2 |
| 31 | 32 | 23 | 21 | 21 | 2 |
Wind in May
Winds average 6 mph in May.
Across May, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
| 31 | 6 | calm |
Sunrise & sunset in May
Daylight runs from about 13 h 36 min at the start of May to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 54 minutes over May. Sunrise moves from 5:19 AM to 4:52 AM, and sunset from 6:54 PM to 7:21 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.6 | 13.6 | 13.7 | 13.7 | 13.7 | 13.8 | 13.8 | 13.8 | 13.9 | 13.9 | 13.9 | 14.0 | 14.0 | 14.0 | 14.1 | 14.1 | 14.1 | 14.2 | 14.2 | 14.2 | 14.2 | 14.3 | 14.3 | 14.3 | 14.3 | 14.4 | 14.4 | 14.4 | 14.4 | 14.5 | 14.5 |
| Sunrise (AM) | 5:19 | 5:17 | 5:16 | 5:15 | 5:14 | 5:13 | 5:12 | 5:11 | 5:09 | 5:08 | 5:07 | 5:06 | 5:05 | 5:04 | 5:04 | 5:03 | 5:02 | 5:01 | 5:00 | 4:59 | 4:59 | 4:58 | 4:57 | 4:56 | 4:56 | 4:55 | 4:55 | 4:54 | 4:53 | 4:53 | 4:52 |
| Sunset (PM) | 6:54 | 6:55 | 6:56 | 6:57 | 6:58 | 6:59 | 7:00 | 7:01 | 7:02 | 7:03 | 7:04 | 7:05 | 7:06 | 7:07 | 7:07 | 7:08 | 7:09 | 7:10 | 7:11 | 7:12 | 7:13 | 7:14 | 7:15 | 7:15 | 7:16 | 7:17 | 7:18 | 7:19 | 7:19 | 7:20 | 7:21 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.6 | 5:19 | 6:54 |
| 2 | 13.6 | 5:17 | 6:55 |
| 3 | 13.7 | 5:16 | 6:56 |
| 4 | 13.7 | 5:15 | 6:57 |
| 5 | 13.7 | 5:14 | 6:58 |
| 6 | 13.8 | 5:13 | 6:59 |
| 7 | 13.8 | 5:12 | 7:00 |
| 8 | 13.8 | 5:11 | 7:01 |
| 9 | 13.9 | 5:09 | 7:02 |
| 10 | 13.9 | 5:08 | 7:03 |
| 11 | 13.9 | 5:07 | 7:04 |
| 12 | 14.0 | 5:06 | 7:05 |
| 13 | 14.0 | 5:05 | 7:06 |
| 14 | 14.0 | 5:04 | 7:07 |
| 15 | 14.1 | 5:04 | 7:07 |
| 16 | 14.1 | 5:03 | 7:08 |
| 17 | 14.1 | 5:02 | 7:09 |
| 18 | 14.2 | 5:01 | 7:10 |
| 19 | 14.2 | 5:00 | 7:11 |
| 20 | 14.2 | 4:59 | 7:12 |
| 21 | 14.2 | 4:59 | 7:13 |
| 22 | 14.3 | 4:58 | 7:14 |
| 23 | 14.3 | 4:57 | 7:15 |
| 24 | 14.3 | 4:56 | 7:15 |
| 25 | 14.3 | 4:56 | 7:16 |
| 26 | 14.4 | 4:55 | 7:17 |
| 27 | 14.4 | 4:55 | 7:18 |
| 28 | 14.4 | 4:54 | 7:19 |
| 29 | 14.4 | 4:53 | 7:19 |
| 30 | 14.5 | 4:53 | 7:20 |
| 31 | 14.5 | 4:52 | 7:21 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 5.71 kWh/m².
For context, solar energy here swings from a low near 1.98 kWh/m² to a high of 6.15 kWh/m² in June across the year — May's 5.71 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.5 | Bright |
| 2 | 5.5 | Bright |
| 3 | 5.5 | Bright |
| 4 | 5.5 | Bright |
| 5 | 5.5 | Bright |
| 6 | 5.6 | Bright |
| 7 | 5.6 | Bright |
| 8 | 5.6 | Bright |
| 9 | 5.6 | Bright |
| 10 | 5.6 | Bright |
| 11 | 5.6 | Bright |
| 12 | 5.6 | Bright |
| 13 | 5.6 | Bright |
| 14 | 5.6 | Bright |
| 15 | 5.7 | Bright |
| 16 | 5.7 | Bright |
| 17 | 5.7 | Bright |
| 18 | 5.7 | Bright |
| 19 | 5.7 | Bright |
| 20 | 5.7 | Bright |
| 21 | 5.7 | Bright |
| 22 | 5.8 | Bright |
| 23 | 5.8 | Bright |
| 24 | 5.8 | Bright |
| 25 | 5.8 | Bright |
| 26 | 5.8 | Bright |
| 27 | 5.9 | Bright |
| 28 | 5.9 | Bright |
| 29 | 5.9 | Bright |
| 30 | 5.9 | Bright |
| 31 | 5.9 | Bright |
Hazard calendar for Dale City
None of Dale City's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Dale City sits in the Atlantic hurricane belt; the season peaks August–October.
Is May a good time to visit Dale City?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a reasonable time to visit Dale City for sightseeing.
What to pack for Dale City in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Dale City sees daytime highs around 75°F and nights near 57°F. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.
UV index in Dale City in May
Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Dale City peaks around July 11 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 7 | 6 | 4 | 3 | 2 |
| Level | Moderate | Moderate | High | High | Very high | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 5 | High |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | High |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Dale City in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in Dale City is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 9 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 12 | 13 | 13 | 15 | 16 | 17 | 15 | 12 | 9 | 9 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 12 | Moderate |
| Mar | 13 | Moderate |
| Apr | 13 | Moderate |
| May | 15 | Moderate |
| Jun | 16 | Moderate |
| Jul | 17 | Moderate |
| Aug | 15 | Moderate |
| Sep | 12 | Moderate |
| Oct | 9 | Good |
| Nov | 9 | Good |
| Dec | 10 | Good |
Where is Dale City?
Dale City sits at 38.6°N, 77.3°W, 230 ft above sea level, in United States. The nearest listed city is Montclair, 2.5 mi away.
Topography around Dale City
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Dale City.
Within 2 miles, the terrain around Dale City has only modest variations in elevation — a maximum elevation change of 364 ft around an average of 220 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 571 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,514 ft.
The land around Dale City is covered by trees (60%) and artificial surfaces (32%) within 2 miles, trees (72%) within 10 miles, and trees (68%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Dale City (38.6371°, -77.3111°, elevation 230 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).