Saint Charles weather in June
In June, Saint Charles sees average daytime highs of 84°F and overnight lows near 67°F, with 4.0 in of rain across 11.2 wet days and about 14.7 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.
Highs climb over the month, from about 81°F in the first days to 86°F by the end. The sky is clear or mostly clear about 34% 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 5th-clearest and 9th-windiest month. For the whole year in context, see Saint Charles's year-round climate.
- Daytime high
- 84°
- 3rd warmest
- Overnight low
- 67°
- 10th coldest
- Rainfall
- 4.0 in
- 11.2 wet days
- Daylight
- 14 h 42 min
- 4:41 AM – 7:23 PM
- Cloud cover
- 55%
- 5th clearest
- Wind
- 6 mph
- 9th windiest
- Solar energy
- 6.42 kWh/m²
- Travel score
- 5.4
- out of 10
Saint Charles is city in and county seat of St. Charles County, Missouri, United States.
- Density
- 1,057/km²
- people per km²
- Founded
- 1765
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in June
Highs climb over the month, from about 81°F in the first days to 86°F by the end.
A typical June day in Saint Charles reaches about 84°F in the afternoon and slips back to 67°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 92°F. Set against its neighbours, June runs about 9°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) | 80 | 80 | 81 | 81 | 81 | 82 | 82 | 82 | 83 | 83 | 83 | 83 | 84 | 84 | 84 | 84 | 85 | 85 | 85 | 85 | 85 | 85 | 86 | 86 | 86 | 86 | 86 | 86 | 86 | 86 |
| Avg low (°F) | 63 | 63 | 64 | 64 | 64 | 65 | 65 | 65 | 65 | 66 | 66 | 66 | 67 | 67 | 67 | 67 | 67 | 68 | 68 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 80 | 63 |
| 2 | 80 | 63 |
| 3 | 81 | 64 |
| 4 | 81 | 64 |
| 5 | 81 | 64 |
| 6 | 82 | 65 |
| 7 | 82 | 65 |
| 8 | 82 | 65 |
| 9 | 83 | 65 |
| 10 | 83 | 66 |
| 11 | 83 | 66 |
| 12 | 83 | 66 |
| 13 | 84 | 67 |
| 14 | 84 | 67 |
| 15 | 84 | 67 |
| 16 | 84 | 67 |
| 17 | 85 | 67 |
| 18 | 85 | 68 |
| 19 | 85 | 68 |
| 20 | 85 | 68 |
| 21 | 85 | 68 |
| 22 | 85 | 68 |
| 23 | 86 | 69 |
| 24 | 86 | 69 |
| 25 | 86 | 69 |
| 26 | 86 | 69 |
| 27 | 86 | 69 |
| 28 | 86 | 69 |
| 29 | 86 | 69 |
| 30 | 86 | 69 |
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 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 39° / 24° | 2.6 | 8 | 3 | 9.6 | 0.0 |
| Feb | 44° / 28° | 2.4 | 7.8 | 2.8 | 10.5 | 0.8 |
| Mar | 55° / 37° | 3.7 | 10.8 | 1.4 | 11.7 | 3.5 |
| Apr | 66° / 47° | 4.5 | 11.4 | 0.2 | 13 | 5.8 |
| May | 75° / 58° | 4.9 | 13.4 | 0 | 14.1 | 6.2 |
| Jun | 84° / 67° | 4.0 | 11.2 | 0 | 14.7 | 5.4 |
| Jul | 87° / 70° | 3.3 | 9.8 | 0 | 14.4 | 4.7 |
| Aug | 86° / 68° | 2.9 | 9 | 0 | 13.5 | 5.3 |
| Sep | 79° / 60° | 3.2 | 7.6 | 0 | 12.3 | 7.1 |
| Oct | 67° / 48° | 3.4 | 8.4 | 0 | 11 | 6.6 |
| Nov | 54° / 37° | 3.6 | 8.7 | 0.8 | 9.9 | 3.5 |
| Dec | 43° / 28° | 2.5 | 8.1 | 2.2 | 9.3 | 0.6 |
Cloud cover in June
The sky is clear or mostly clear about 34% of the time in June.
Beyond those clear spells, partly cloudy skies cover about 19% of June, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to open up as the month goes on.
| 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 (%) | 45 | 46 | 46 | 47 | 49 | 49 | 49 | 51 | 51 | 52 | 53 | 52 | 53 | 54 | 54 | 55 | 55 | 56 | 56 | 56 | 57 | 57 | 57 | 56 | 56 | 56 | 56 | 56 | 58 | 58 |
| Cloudier (%) | 55 | 54 | 54 | 53 | 51 | 51 | 51 | 49 | 49 | 48 | 47 | 48 | 47 | 46 | 46 | 45 | 45 | 44 | 44 | 44 | 43 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 42 | 42 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 45 | 55 |
| 2 | 46 | 54 |
| 3 | 46 | 54 |
| 4 | 47 | 53 |
| 5 | 49 | 51 |
| 6 | 49 | 51 |
| 7 | 49 | 51 |
| 8 | 51 | 49 |
| 9 | 51 | 49 |
| 10 | 52 | 48 |
| 11 | 53 | 47 |
| 12 | 52 | 48 |
| 13 | 53 | 47 |
| 14 | 54 | 46 |
| 15 | 54 | 46 |
| 16 | 55 | 45 |
| 17 | 55 | 45 |
| 18 | 56 | 44 |
| 19 | 56 | 44 |
| 20 | 56 | 44 |
| 21 | 57 | 43 |
| 22 | 57 | 43 |
| 23 | 57 | 43 |
| 24 | 56 | 44 |
| 25 | 56 | 44 |
| 26 | 56 | 44 |
| 27 | 56 | 44 |
| 28 | 56 | 44 |
| 29 | 58 | 42 |
| 30 | 58 | 42 |
Chance of precipitation in June
Saint Charles gets around 4.0 in of rain over 11.2 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 38% and peaks near 39% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 39 | 39 | 39 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 37 | 37 | 37 | 37 | 37 | 36 | 36 | 36 |
| Rain chance (%) | |
|---|---|
| 1 | 39 |
| 2 | 39 |
| 3 | 39 |
| 4 | 38 |
| 5 | 38 |
| 6 | 38 |
| 7 | 38 |
| 8 | 38 |
| 9 | 38 |
| 10 | 38 |
| 11 | 39 |
| 12 | 39 |
| 13 | 39 |
| 14 | 39 |
| 15 | 39 |
| 16 | 39 |
| 17 | 39 |
| 18 | 39 |
| 19 | 39 |
| 20 | 38 |
| 21 | 38 |
| 22 | 38 |
| 23 | 37 |
| 24 | 37 |
| 25 | 37 |
| 26 | 37 |
| 27 | 37 |
| 28 | 36 |
| 29 | 36 |
| 30 | 36 |
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 34% of days. Sticky, muggy-or-worse air turns up on roughly 50% 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 (%) | 26 | 25 | 23 | 22 | 21 | 20 | 19 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 |
| Comfortable (%) | 21 | 21 | 22 | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 13 | 13 | 13 |
| Humid (%) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 |
| Muggy (%) | 29 | 30 | 30 | 31 | 31 | 32 | 32 | 33 | 33 | 34 | 34 | 35 | 35 | 36 | 36 | 36 | 37 | 37 | 36 | 36 | 36 | 36 | 35 | 35 | 34 | 34 | 33 | 33 | 32 | 32 |
| Oppressive (%) | 4 | 4 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 15 | 16 | 17 | 18 | 19 | 20 | 20 | 21 | 22 | 22 | 23 | 24 | 24 | 25 | 26 | 27 | 28 | 29 |
| 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 | 0 | 0 | 0 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 26 | 21 | 20 | 29 | 4 | 0 |
| 2 | 25 | 21 | 20 | 30 | 4 | 0 |
| 3 | 23 | 22 | 20 | 30 | 5 | 0 |
| 4 | 22 | 22 | 20 | 31 | 5 | 0 |
| 5 | 21 | 22 | 20 | 31 | 6 | 0 |
| 6 | 20 | 21 | 20 | 32 | 7 | 0 |
| 7 | 19 | 21 | 20 | 32 | 8 | 0 |
| 8 | 17 | 20 | 20 | 33 | 9 | 0 |
| 9 | 16 | 20 | 21 | 33 | 10 | 0 |
| 10 | 15 | 19 | 21 | 34 | 11 | 0 |
| 11 | 14 | 18 | 21 | 34 | 12 | 0 |
| 12 | 13 | 17 | 22 | 35 | 13 | 0 |
| 13 | 12 | 16 | 22 | 35 | 15 | 0 |
| 14 | 11 | 15 | 22 | 36 | 16 | 0 |
| 15 | 10 | 14 | 22 | 36 | 17 | 0 |
| 16 | 9 | 14 | 22 | 36 | 18 | 0 |
| 17 | 9 | 13 | 22 | 37 | 19 | 0 |
| 18 | 8 | 13 | 22 | 37 | 20 | 0 |
| 19 | 8 | 13 | 22 | 36 | 20 | 0 |
| 20 | 8 | 13 | 22 | 36 | 21 | 0 |
| 21 | 7 | 13 | 22 | 36 | 22 | 0 |
| 22 | 7 | 13 | 22 | 36 | 22 | 0 |
| 23 | 7 | 13 | 22 | 35 | 23 | 0 |
| 24 | 6 | 13 | 22 | 35 | 24 | 0 |
| 25 | 6 | 13 | 22 | 34 | 24 | 0 |
| 26 | 6 | 14 | 22 | 34 | 25 | 0 |
| 27 | 5 | 14 | 21 | 33 | 26 | 0 |
| 28 | 5 | 13 | 21 | 33 | 27 | 0 |
| 29 | 5 | 13 | 21 | 32 | 28 | 0 |
| 30 | 5 | 13 | 21 | 32 | 29 | 1 |
Wind in June
Winds average 6 mph in June.
Across June, daily wind ranges from about 6 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 | 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 |
| 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 | 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 |
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 4:44 AM to 4:44 AM, and sunset from 7:15 PM to 7:26 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 | 14.6 | 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 | 14.7 | 14.7 |
| Sunrise (AM) | 4:44 | 4:44 | 4:43 | 4:43 | 4:43 | 4:42 | 4:42 | 4:42 | 4:42 | 4:42 | 4:41 | 4:41 | 4:41 | 4:41 | 4:41 | 4:41 | 4:41 | 4:41 | 4:41 | 4:42 | 4:42 | 4:42 | 4:42 | 4:42 | 4:43 | 4:43 | 4:43 | 4:44 | 4:44 | 4:44 |
| Sunset (PM) | 7:15 | 7:15 | 7:16 | 7:17 | 7:17 | 7:18 | 7:19 | 7:19 | 7:20 | 7:20 | 7:21 | 7:21 | 7:22 | 7:22 | 7:23 | 7:23 | 7:24 | 7:24 | 7:24 | 7:24 | 7:25 | 7:25 | 7:25 | 7:25 | 7:26 | 7:26 | 7:26 | 7:26 | 7:26 | 7:26 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.5 | 4:44 | 7:15 |
| 2 | 14.5 | 4:44 | 7:15 |
| 3 | 14.5 | 4:43 | 7:16 |
| 4 | 14.6 | 4:43 | 7:17 |
| 5 | 14.6 | 4:43 | 7:17 |
| 6 | 14.6 | 4:42 | 7:18 |
| 7 | 14.6 | 4:42 | 7:19 |
| 8 | 14.6 | 4:42 | 7:19 |
| 9 | 14.6 | 4:42 | 7:20 |
| 10 | 14.6 | 4:42 | 7:20 |
| 11 | 14.7 | 4:41 | 7:21 |
| 12 | 14.7 | 4:41 | 7:21 |
| 13 | 14.7 | 4:41 | 7:22 |
| 14 | 14.7 | 4:41 | 7:22 |
| 15 | 14.7 | 4:41 | 7:23 |
| 16 | 14.7 | 4:41 | 7:23 |
| 17 | 14.7 | 4:41 | 7:24 |
| 18 | 14.7 | 4:41 | 7:24 |
| 19 | 14.7 | 4:41 | 7:24 |
| 20 | 14.7 | 4:42 | 7:24 |
| 21 | 14.7 | 4:42 | 7:25 |
| 22 | 14.7 | 4:42 | 7:25 |
| 23 | 14.7 | 4:42 | 7:25 |
| 24 | 14.7 | 4:42 | 7:25 |
| 25 | 14.7 | 4:43 | 7:26 |
| 26 | 14.7 | 4:43 | 7:26 |
| 27 | 14.7 | 4:43 | 7:26 |
| 28 | 14.7 | 4:44 | 7:26 |
| 29 | 14.7 | 4:44 | 7:26 |
| 30 | 14.7 | 4:44 | 7:26 |
Solar energy in June
Average shortwave solar energy reaching the ground each day in June, about 6.42 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 1.91 kWh/m² to a high of 6.42 kWh/m² in June across the year — June's 6.42 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) | 6.1 | 6.1 | 6.1 | 6.1 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 |
| Level | 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 | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.1 | Intense |
| 2 | 6.1 | Intense |
| 3 | 6.1 | Intense |
| 4 | 6.1 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.2 | Intense |
| 8 | 6.2 | Intense |
| 9 | 6.3 | Intense |
| 10 | 6.3 | Intense |
| 11 | 6.3 | Intense |
| 12 | 6.3 | Intense |
| 13 | 6.4 | Intense |
| 14 | 6.4 | Intense |
| 15 | 6.4 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.5 | Intense |
| 18 | 6.5 | Intense |
| 19 | 6.5 | Intense |
| 20 | 6.5 | Intense |
| 21 | 6.5 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.6 | Intense |
| 24 | 6.6 | Intense |
| 25 | 6.6 | Intense |
| 26 | 6.6 | Intense |
| 27 | 6.6 | Intense |
| 28 | 6.6 | Intense |
| 29 | 6.6 | Intense |
| 30 | 6.6 | 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 84°F and nights near 67°F. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.
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 June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 7 | 8 | 9 | 9 | 8 | 7 | 4 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | 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 17 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (October, 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 | 11 | 11 | 10 | 13 | 14 | 17 | 14 | 11 | 7 | 7 | 8 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 11 | Good |
| Mar | 11 | Good |
| Apr | 10 | Good |
| May | 13 | Moderate |
| Jun | 14 | Moderate |
| Jul | 17 | Moderate |
| Aug | 14 | Moderate |
| Sep | 11 | Good |
| Oct | 7 | Good |
| Nov | 7 | Good |
| Dec | 8 | Good |
Where is Saint Charles?
Saint Charles sits at 38.8°N, 90.5°W, 482 ft above sea level, in United States. The nearest listed city is Maryland Heights, 5.6 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 220 ft around an average of 489 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 482 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 902 ft.
The land around Saint Charles is covered by artificial surfaces (43%) and trees (30%) within 2 miles, trees (34%), cropland (27%) and artificial surfaces (21%) within 10 miles, and trees (48%) and cropland (36%) 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 (38.7839°, -90.4812°, elevation 482 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).