Saint Charles weather in June
In June, Saint Charles sees average daytime highs of 83°F and overnight lows near 68°F, with 3.5 in of rain across 10.9 wet days and about 14.6 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.
Highs climb over the month, from about 80°F in the first days to 85°F by the end. The sky is clear or mostly clear about 27% of the time in June, and the air most often feels muggy.
Daylight stretches from about 14 h 30 min at the start of June to 14 h 42 min by month's end. Set against the rest of the year, June is Saint Charles's 11th-clearest and 10th-windiest month. For the whole year in context, see Saint Charles's year-round climate.
- Daytime high
- 83°
- 3rd warmest
- Overnight low
- 68°
- 10th coldest
- Rainfall
- 3.5 in
- 10.9 wet days
- Daylight
- 14 h 42 min
- 4:48 AM – 7:28 PM
- Cloud cover
- 61%
- 11th clearest
- Wind
- 6 mph
- 10th windiest
- Solar energy
- 6.15 kWh/m²
- Travel score
- 5.7
- out of 10
Saint Charles is census designated place in Charles County, Maryland, United States.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in June
Highs climb over the month, from about 80°F in the first days to 85°F by the end.
A typical June day in Saint Charles reaches about 83°F in the afternoon and slips back to 68°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 91°F. Set against its neighbours, June runs about 8°F warmer than May and about 4°F cooler than July.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 79 | 79 | 80 | 80 | 80 | 80 | 81 | 81 | 81 | 82 | 82 | 82 | 82 | 82 | 83 | 83 | 83 | 83 | 83 | 84 | 84 | 84 | 84 | 85 | 85 | 85 | 85 | 85 | 85 | 86 |
| Avg low (°F) | 64 | 65 | 65 | 65 | 66 | 66 | 66 | 66 | 67 | 67 | 67 | 68 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 70 | 70 | 70 | 70 | 70 | 71 | 71 | 71 | 71 | 71 | 71 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 79 | 64 |
| 2 | 79 | 65 |
| 3 | 80 | 65 |
| 4 | 80 | 65 |
| 5 | 80 | 66 |
| 6 | 80 | 66 |
| 7 | 81 | 66 |
| 8 | 81 | 66 |
| 9 | 81 | 67 |
| 10 | 82 | 67 |
| 11 | 82 | 67 |
| 12 | 82 | 68 |
| 13 | 82 | 68 |
| 14 | 82 | 68 |
| 15 | 83 | 68 |
| 16 | 83 | 69 |
| 17 | 83 | 69 |
| 18 | 83 | 69 |
| 19 | 83 | 69 |
| 20 | 84 | 70 |
| 21 | 84 | 70 |
| 22 | 84 | 70 |
| 23 | 84 | 70 |
| 24 | 85 | 70 |
| 25 | 85 | 71 |
| 26 | 85 | 71 |
| 27 | 85 | 71 |
| 28 | 85 | 71 |
| 29 | 85 | 71 |
| 30 | 86 | 71 |
How June really feels in Saint Charles
Once humidity and wind are folded in, June 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.
June sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Saint Charles weather by month
How June compares with the rest of the year at a glance. June is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 44° / 31° | 3.0 | 8.7 | 2.7 | 9.6 | 0.7 |
| Feb | 47° / 32° | 2.8 | 8.4 | 2.2 | 10.5 | 1.4 |
| Mar | 55° / 39° | 3.9 | 10.1 | 1.5 | 11.7 | 3.5 |
| Apr | 66° / 50° | 3.3 | 9.4 | 0 | 13 | 6.0 |
| May | 74° / 59° | 3.4 | 10.4 | 0 | 14.1 | 6.7 |
| Jun | 83° / 68° | 3.5 | 10.9 | 0 | 14.6 | 5.7 |
| Jul | 87° / 73° | 3.8 | 12 | 0 | 14.4 | 4.6 |
| Aug | 85° / 71° | 3.7 | 10.2 | 0 | 13.5 | 5.4 |
| Sep | 78° / 64° | 4.1 | 9.2 | 0 | 12.3 | 6.9 |
| Oct | 67° / 53° | 3.4 | 7.7 | 0 | 11 | 6.6 |
| Nov | 56° / 42° | 2.9 | 7.4 | 0.1 | 9.9 | 4.2 |
| Dec | 48° / 35° | 3.3 | 8.7 | 1.2 | 9.4 | 1.8 |
Cloud cover in June
The sky is clear or mostly clear about 27% of the time in June.
Beyond those clear spells, partly cloudy skies cover about 22% of June, with mostly cloudy or overcast conditions the remaining 52%.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 46 | 46 | 46 | 46 | 47 | 46 | 46 | 46 | 47 | 46 | 46 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 48 | 49 | 49 | 50 | 50 | 50 | 51 | 51 | 51 | 52 | 52 | 53 |
| Cloudier (%) | 54 | 54 | 54 | 54 | 53 | 54 | 54 | 54 | 53 | 54 | 54 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 52 | 51 | 51 | 50 | 50 | 50 | 49 | 49 | 49 | 48 | 48 | 47 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 46 | 54 |
| 2 | 46 | 54 |
| 3 | 46 | 54 |
| 4 | 46 | 54 |
| 5 | 47 | 53 |
| 6 | 46 | 54 |
| 7 | 46 | 54 |
| 8 | 46 | 54 |
| 9 | 47 | 53 |
| 10 | 46 | 54 |
| 11 | 46 | 54 |
| 12 | 47 | 53 |
| 13 | 47 | 53 |
| 14 | 47 | 53 |
| 15 | 47 | 53 |
| 16 | 47 | 53 |
| 17 | 47 | 53 |
| 18 | 47 | 53 |
| 19 | 48 | 52 |
| 20 | 49 | 51 |
| 21 | 49 | 51 |
| 22 | 50 | 50 |
| 23 | 50 | 50 |
| 24 | 50 | 50 |
| 25 | 51 | 49 |
| 26 | 51 | 49 |
| 27 | 51 | 49 |
| 28 | 52 | 48 |
| 29 | 52 | 48 |
| 30 | 53 | 47 |
Chance of precipitation in June
Saint Charles gets around 3.5 in of rain over 10.9 wet days in June. 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 39% on the wettest days. The odds climb toward the end of the month.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 33 | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 34 | 34 | 35 | 35 | 36 | 36 | 37 | 37 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 |
| Rain chance (%) | |
|---|---|
| 1 | 33 |
| 2 | 32 |
| 3 | 32 |
| 4 | 32 |
| 5 | 32 |
| 6 | 33 |
| 7 | 33 |
| 8 | 33 |
| 9 | 34 |
| 10 | 34 |
| 11 | 35 |
| 12 | 35 |
| 13 | 36 |
| 14 | 36 |
| 15 | 37 |
| 16 | 37 |
| 17 | 38 |
| 18 | 38 |
| 19 | 38 |
| 20 | 38 |
| 21 | 39 |
| 22 | 39 |
| 23 | 39 |
| 24 | 39 |
| 25 | 39 |
| 26 | 39 |
| 27 | 39 |
| 28 | 39 |
| 29 | 39 |
| 30 | 39 |
Humidity in June
Most of June feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, June lands in the muggy band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 49% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 24 | 23 | 22 | 21 | 20 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 12 | 11 | 10 | 9 | 9 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 |
| Comfortable (%) | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 |
| Humid (%) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 22 | 22 | 21 | 20 |
| Muggy (%) | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 30 | 30 | 31 | 32 | 32 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 35 | 35 | 35 | 34 | 34 | 33 | 33 | 32 |
| Oppressive (%) | 5 | 6 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 19 | 20 | 21 | 22 | 23 | 23 | 24 | 25 | 26 | 27 | 29 | 30 | 31 | 33 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 24 | 21 | 24 | 26 | 5 | 0 |
| 2 | 23 | 21 | 24 | 27 | 6 | 0 |
| 3 | 22 | 20 | 24 | 27 | 6 | 0 |
| 4 | 21 | 20 | 24 | 28 | 7 | 0 |
| 5 | 20 | 20 | 24 | 28 | 8 | 0 |
| 6 | 20 | 19 | 24 | 28 | 9 | 0 |
| 7 | 19 | 19 | 24 | 28 | 10 | 0 |
| 8 | 18 | 18 | 24 | 28 | 11 | 0 |
| 9 | 17 | 18 | 25 | 29 | 12 | 0 |
| 10 | 16 | 17 | 25 | 29 | 13 | 0 |
| 11 | 15 | 17 | 25 | 30 | 14 | 0 |
| 12 | 14 | 16 | 25 | 30 | 15 | 0 |
| 13 | 13 | 15 | 24 | 31 | 16 | 0 |
| 14 | 12 | 15 | 24 | 32 | 17 | 0 |
| 15 | 12 | 14 | 24 | 32 | 18 | 0 |
| 16 | 11 | 14 | 24 | 33 | 19 | 0 |
| 17 | 10 | 13 | 24 | 33 | 19 | 0 |
| 18 | 9 | 13 | 24 | 33 | 20 | 0 |
| 19 | 9 | 12 | 24 | 34 | 21 | 0 |
| 20 | 8 | 12 | 24 | 34 | 22 | 0 |
| 21 | 7 | 12 | 24 | 34 | 23 | 0 |
| 22 | 7 | 11 | 24 | 34 | 23 | 0 |
| 23 | 6 | 11 | 24 | 35 | 24 | 0 |
| 24 | 6 | 11 | 24 | 35 | 25 | 0 |
| 25 | 5 | 11 | 23 | 35 | 26 | 0 |
| 26 | 5 | 10 | 23 | 34 | 27 | 0 |
| 27 | 4 | 10 | 22 | 34 | 29 | 1 |
| 28 | 4 | 10 | 22 | 33 | 30 | 1 |
| 29 | 4 | 10 | 21 | 33 | 31 | 1 |
| 30 | 3 | 10 | 20 | 32 | 33 | 1 |
Wind in June
Winds average 6 mph in June.
Across June, daily wind ranges from about 5 mph on the calmest days to 6 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 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 |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
Sunrise & sunset in June
Daylight runs from about 14 h 30 min at the start of June to 14 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over June. Sunrise moves from 4:51 AM to 4:51 AM, and sunset from 7:20 PM to 7:31 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.5 | 14.5 | 14.5 | 14.5 | 14.6 | 14.6 | 14.6 | 14.6 | 14.6 | 14.6 | 14.6 | 14.6 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 |
| Sunrise (AM) | 4:51 | 4:50 | 4:50 | 4:49 | 4:49 | 4:49 | 4:49 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:48 | 4:49 | 4:49 | 4:49 | 4:50 | 4:50 | 4:50 | 4:51 |
| Sunset (PM) | 7:20 | 7:21 | 7:21 | 7:22 | 7:23 | 7:23 | 7:24 | 7:25 | 7:25 | 7:26 | 7:26 | 7:27 | 7:27 | 7:28 | 7:28 | 7:28 | 7:29 | 7:29 | 7:29 | 7:30 | 7:30 | 7:30 | 7:30 | 7:31 | 7:31 | 7:31 | 7:31 | 7:31 | 7:31 | 7:31 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.5 | 4:51 | 7:20 |
| 2 | 14.5 | 4:50 | 7:21 |
| 3 | 14.5 | 4:50 | 7:21 |
| 4 | 14.5 | 4:49 | 7:22 |
| 5 | 14.6 | 4:49 | 7:23 |
| 6 | 14.6 | 4:49 | 7:23 |
| 7 | 14.6 | 4:49 | 7:24 |
| 8 | 14.6 | 4:48 | 7:25 |
| 9 | 14.6 | 4:48 | 7:25 |
| 10 | 14.6 | 4:48 | 7:26 |
| 11 | 14.6 | 4:48 | 7:26 |
| 12 | 14.6 | 4:48 | 7:27 |
| 13 | 14.7 | 4:48 | 7:27 |
| 14 | 14.7 | 4:48 | 7:28 |
| 15 | 14.7 | 4:48 | 7:28 |
| 16 | 14.7 | 4:48 | 7:28 |
| 17 | 14.7 | 4:48 | 7:29 |
| 18 | 14.7 | 4:48 | 7:29 |
| 19 | 14.7 | 4:48 | 7:29 |
| 20 | 14.7 | 4:48 | 7:30 |
| 21 | 14.7 | 4:48 | 7:30 |
| 22 | 14.7 | 4:48 | 7:30 |
| 23 | 14.7 | 4:48 | 7:30 |
| 24 | 14.7 | 4:49 | 7:31 |
| 25 | 14.7 | 4:49 | 7:31 |
| 26 | 14.7 | 4:49 | 7:31 |
| 27 | 14.7 | 4:50 | 7:31 |
| 28 | 14.7 | 4:50 | 7:31 |
| 29 | 14.7 | 4:50 | 7:31 |
| 30 | 14.7 | 4:51 | 7:31 |
Solar energy in June
Average shortwave solar energy reaching the ground each day in June, about 6.15 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2 kWh/m² to a high of 6.15 kWh/m² in June across the year — June's 6.15 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 |
| Level | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.0 | Bright |
| 2 | 6.0 | Bright |
| 3 | 6.0 | Intense |
| 4 | 6.0 | Intense |
| 5 | 6.0 | Intense |
| 6 | 6.0 | Intense |
| 7 | 6.0 | Intense |
| 8 | 6.1 | Intense |
| 9 | 6.1 | Intense |
| 10 | 6.1 | Intense |
| 11 | 6.1 | Intense |
| 12 | 6.1 | Intense |
| 13 | 6.1 | Intense |
| 14 | 6.1 | Intense |
| 15 | 6.2 | Intense |
| 16 | 6.2 | Intense |
| 17 | 6.2 | Intense |
| 18 | 6.2 | Intense |
| 19 | 6.2 | Intense |
| 20 | 6.2 | Intense |
| 21 | 6.2 | Intense |
| 22 | 6.2 | Intense |
| 23 | 6.2 | Intense |
| 24 | 6.2 | Intense |
| 25 | 6.3 | Intense |
| 26 | 6.3 | Intense |
| 27 | 6.3 | Intense |
| 28 | 6.3 | Intense |
| 29 | 6.3 | Intense |
| 30 | 6.3 | Intense |
Hazard calendar for Saint Charles
In June, Saint Charles sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
Saint Charles sits in the Atlantic hurricane belt; the season peaks August–October.
Is June a good time to visit Saint Charles?
Our two travel scores rate June for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
June is a reasonable time to visit Saint Charles for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Saint Charles in June
From June's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In June, Saint Charles sees daytime highs around 83°F and nights near 68°F. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.
Sea temperature near Saint Charles in June
The nearest coast averages about 68°F in June — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 30 mi away) is warmest in August at about 78°F and coldest in February near 37°F.
It's comfortable for a long swim from Jun 16 to Oct 6 — about 3.7 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 38 | 37 | 40 | 47 | 57 | 68 | 76 | 78 | 74 | 65 | 54 | 45 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Refreshing | Warm | Warm | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 38 | Bracing |
| Feb | 37 | Bracing |
| Mar | 40 | Bracing |
| Apr | 47 | Bracing |
| May | 57 | Bracing |
| Jun | 68 | Refreshing |
| Jul | 76 | Warm |
| Aug | 78 | Warm |
| Sep | 74 | Refreshing |
| Oct | 65 | Cool |
| Nov | 54 | Bracing |
| Dec | 45 | Bracing |
UV index in Saint Charles in June
Clear-sky midday UV in June peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Saint Charles 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 | Moderate | High | Very high | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| 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 Saint Charles in June
Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.
Air quality in Saint Charles is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 7 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) | 9 | 10 | 12 | 13 | 14 | 15 | 16 | 14 | 11 | 8 | 7 | 8 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 10 | Good |
| Mar | 12 | Good |
| Apr | 13 | Moderate |
| May | 14 | Moderate |
| Jun | 15 | Moderate |
| Jul | 16 | Moderate |
| Aug | 14 | Moderate |
| Sep | 11 | Good |
| Oct | 8 | Good |
| Nov | 7 | Good |
| Dec | 8 | Good |
Where is Saint Charles?
Saint Charles sits at 38.6°N, 76.9°W, 200 ft above sea level, in United States. The nearest listed city is St. Charles, 0.6 mi away.
Topography around Saint Charles
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Saint Charles.
Within 2 miles, the terrain around Saint Charles has only modest variations in elevation — a maximum elevation change of 98 ft around an average of 213 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 312 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,539 ft.
The land around Saint Charles is covered by trees (61%) and artificial surfaces (24%) within 2 miles, trees (77%) within 10 miles, and trees (60%) and water (20%) 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 Saint Charles (38.6032°, -76.9386°, elevation 200 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). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).