Mount Vernon weather in April
In April, Mount Vernon sees average daytime highs of 67°F and overnight lows near 49°F, with 5.2 in of precipitation across 11.3 wet days and about 13 hours of daylight. It is the 7th-warmest and 1st-wettest month of the year here.
Highs climb over the month, from about 63°F in the first days to 71°F by the end. The sky is clear or mostly clear about 31% of the time in April, and the air most often feels dry.
Daylight stretches from about 12 h 24 min at the start of April to 13 h 30 min by month's end. Set against the rest of the year, April is Mount Vernon's 7th-clearest and 1st-windiest month. For the whole year in context, see Mount Vernon's year-round climate.
- Daytime high
- 67°
- 7th warmest
- Overnight low
- 49°
- 6th coldest
- Precipitation
- 5.2 in
- 11.3 wet days
- Daylight
- 13 hours
- 5:26 AM – 6:26 PM
- Cloud cover
- 60%
- 7th clearest
- Wind
- 9 mph
- 1st windiest
- Solar energy
- 5.25 kWh/m²
- Travel score
- 5.9
- out of 10
Mount Vernon is city located near the center of Jefferson County, Illinois, United States.
- Density
- 396/km²
- people per km²
- Founded
- 1817
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Highs climb over the month, from about 63°F in the first days to 71°F by the end.
A typical April day in Mount Vernon reaches about 67°F in the afternoon and slips back to 49°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 54°F and 80°F. Set against its neighbours, April runs about 11°F warmer than March and about 9°F cooler than May.
| 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) | 62 | 63 | 63 | 64 | 64 | 64 | 65 | 65 | 66 | 66 | 66 | 67 | 67 | 67 | 68 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 69 | 70 | 70 | 70 | 70 | 71 | 71 | 71 |
| Avg low (°F) | 44 | 44 | 45 | 45 | 45 | 46 | 46 | 46 | 47 | 47 | 47 | 48 | 48 | 48 | 49 | 49 | 49 | 50 | 50 | 50 | 51 | 51 | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 53 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 62 | 44 |
| 2 | 63 | 44 |
| 3 | 63 | 45 |
| 4 | 64 | 45 |
| 5 | 64 | 45 |
| 6 | 64 | 46 |
| 7 | 65 | 46 |
| 8 | 65 | 46 |
| 9 | 66 | 47 |
| 10 | 66 | 47 |
| 11 | 66 | 47 |
| 12 | 67 | 48 |
| 13 | 67 | 48 |
| 14 | 67 | 48 |
| 15 | 68 | 49 |
| 16 | 68 | 49 |
| 17 | 68 | 49 |
| 18 | 68 | 50 |
| 19 | 69 | 50 |
| 20 | 69 | 50 |
| 21 | 69 | 51 |
| 22 | 69 | 51 |
| 23 | 69 | 51 |
| 24 | 70 | 51 |
| 25 | 70 | 52 |
| 26 | 70 | 52 |
| 27 | 70 | 52 |
| 28 | 71 | 53 |
| 29 | 71 | 53 |
| 30 | 71 | 53 |
How April really feels in Mount Vernon
Once humidity and wind are folded in, April 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.
April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Mount Vernon weather by month
How April compares with the rest of the year at a glance. April is the 7th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 41° / 26° | 3.3 | 9 | 2.6 | 9.6 | 0.0 |
| Feb | 45° / 30° | 2.9 | 8.4 | 2.7 | 10.5 | 1.1 |
| Mar | 56° / 38° | 4.1 | 10.8 | 1.2 | 11.7 | 3.7 |
| Apr | 67° / 49° | 5.2 | 11.3 | 0.1 | 13 | 5.9 |
| May | 76° / 59° | 5.1 | 12.9 | 0 | 14 | 6.3 |
| Jun | 85° / 68° | 3.9 | 10.4 | 0 | 14.6 | 5.2 |
| Jul | 88° / 71° | 3.4 | 10.3 | 0 | 14.4 | 4.5 |
| Aug | 86° / 69° | 2.8 | 8.4 | 0 | 13.5 | 5.2 |
| Sep | 80° / 61° | 3.0 | 7.3 | 0 | 12.3 | 7.0 |
| Oct | 68° / 49° | 3.6 | 7.9 | 0 | 11 | 6.8 |
| Nov | 55° / 39° | 3.8 | 8.8 | 0.6 | 9.9 | 3.6 |
| Dec | 44° / 31° | 3.2 | 8.6 | 2 | 9.4 | 0.9 |
Cloud cover in April
The sky is clear or mostly clear about 31% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 56%.
| 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 (%) | 43 | 44 | 44 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 46 | 45 | 46 | 45 | 45 | 45 | 44 | 44 | 43 | 43 | 43 | 43 | 43 | 42 | 42 | 41 | 42 | 42 | 42 | 42 |
| Cloudier (%) | 57 | 56 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 54 | 55 | 54 | 55 | 55 | 55 | 56 | 56 | 57 | 57 | 57 | 57 | 57 | 58 | 58 | 59 | 58 | 58 | 58 | 58 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 43 | 57 |
| 2 | 44 | 56 |
| 3 | 44 | 56 |
| 4 | 45 | 55 |
| 5 | 45 | 55 |
| 6 | 45 | 55 |
| 7 | 45 | 55 |
| 8 | 45 | 55 |
| 9 | 45 | 55 |
| 10 | 45 | 55 |
| 11 | 46 | 54 |
| 12 | 45 | 55 |
| 13 | 46 | 54 |
| 14 | 45 | 55 |
| 15 | 45 | 55 |
| 16 | 45 | 55 |
| 17 | 44 | 56 |
| 18 | 44 | 56 |
| 19 | 43 | 57 |
| 20 | 43 | 57 |
| 21 | 43 | 57 |
| 22 | 43 | 57 |
| 23 | 43 | 57 |
| 24 | 42 | 58 |
| 25 | 42 | 58 |
| 26 | 41 | 59 |
| 27 | 42 | 58 |
| 28 | 42 | 58 |
| 29 | 42 | 58 |
| 30 | 42 | 58 |
Chance of precipitation in April
Mount Vernon gets around 5.2 in of rain and snow over 11.3 wet days in April, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 38% and peaks near 44% on the wettest days, and about 0 day brings snow. 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 (%) | 37 | 37 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 38 | 38 | 39 | 40 | 41 | 41 | 42 | 43 | 43 | 44 | 44 | 44 |
| Rain chance (%) | |
|---|---|
| 1 | 37 |
| 2 | 37 |
| 3 | 36 |
| 4 | 36 |
| 5 | 36 |
| 6 | 36 |
| 7 | 36 |
| 8 | 36 |
| 9 | 36 |
| 10 | 36 |
| 11 | 36 |
| 12 | 36 |
| 13 | 36 |
| 14 | 36 |
| 15 | 36 |
| 16 | 36 |
| 17 | 37 |
| 18 | 37 |
| 19 | 38 |
| 20 | 38 |
| 21 | 39 |
| 22 | 40 |
| 23 | 41 |
| 24 | 41 |
| 25 | 42 |
| 26 | 43 |
| 27 | 43 |
| 28 | 44 |
| 29 | 44 |
| 30 | 44 |
Humidity in April
Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the dry band about 81% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 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 (%) | 91 | 90 | 90 | 89 | 88 | 88 | 87 | 86 | 86 | 85 | 84 | 83 | 83 | 82 | 82 | 82 | 81 | 81 | 80 | 80 | 78 | 78 | 77 | 76 | 76 | 74 | 73 | 72 | 70 | 68 |
| Comfortable (%) | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 17 | 18 | 18 |
| Humid (%) | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 11 | 12 |
| Muggy (%) | 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 | 2 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 91 | 6 | 3 | 0 |
| 2 | 90 | 6 | 4 | 0 |
| 3 | 90 | 6 | 4 | 0 |
| 4 | 89 | 7 | 4 | 0 |
| 5 | 88 | 7 | 5 | 0 |
| 6 | 88 | 7 | 5 | 0 |
| 7 | 87 | 8 | 5 | 0 |
| 8 | 86 | 8 | 6 | 0 |
| 9 | 86 | 8 | 6 | 0 |
| 10 | 85 | 9 | 6 | 0 |
| 11 | 84 | 9 | 7 | 0 |
| 12 | 83 | 10 | 7 | 0 |
| 13 | 83 | 10 | 7 | 0 |
| 14 | 82 | 11 | 7 | 0 |
| 15 | 82 | 12 | 6 | 0 |
| 16 | 82 | 12 | 6 | 0 |
| 17 | 81 | 13 | 6 | 0 |
| 18 | 81 | 13 | 6 | 0 |
| 19 | 80 | 14 | 6 | 0 |
| 20 | 80 | 14 | 6 | 0 |
| 21 | 78 | 15 | 7 | 0 |
| 22 | 78 | 15 | 7 | 0 |
| 23 | 77 | 16 | 7 | 0 |
| 24 | 76 | 16 | 8 | 0 |
| 25 | 76 | 16 | 8 | 0 |
| 26 | 74 | 17 | 9 | 0 |
| 27 | 73 | 17 | 9 | 1 |
| 28 | 72 | 17 | 10 | 1 |
| 29 | 70 | 18 | 11 | 1 |
| 30 | 68 | 18 | 12 | 2 |
Wind in April
Winds average 9 mph in April, the windiest month of the year.
Across April, daily wind ranges from about 8 mph on the calmest days to 9 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) | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 8 | light breeze |
| 2 | 8 | light breeze |
| 3 | 8 | light breeze |
| 4 | 8 | light breeze |
| 5 | 9 | light breeze |
| 6 | 9 | light breeze |
| 7 | 9 | light breeze |
| 8 | 9 | light breeze |
| 9 | 9 | light breeze |
| 10 | 9 | light breeze |
| 11 | 9 | light breeze |
| 12 | 9 | light breeze |
| 13 | 9 | light breeze |
| 14 | 9 | light breeze |
| 15 | 9 | light breeze |
| 16 | 9 | light breeze |
| 17 | 9 | light breeze |
| 18 | 9 | light breeze |
| 19 | 9 | light breeze |
| 20 | 9 | light breeze |
| 21 | 8 | light breeze |
| 22 | 8 | light breeze |
| 23 | 8 | light breeze |
| 24 | 8 | light breeze |
| 25 | 8 | light breeze |
| 26 | 8 | light breeze |
| 27 | 8 | light breeze |
| 28 | 8 | light breeze |
| 29 | 8 | light breeze |
| 30 | 8 | light breeze |
Sunrise & sunset in April
Daylight runs from about 12 h 24 min at the start of April to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 66 minutes over April. Sunrise moves from 5:49 AM to 5:07 AM, and sunset from 6:11 PM to 6:39 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) | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.6 | 12.6 | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 | 12.9 | 12.9 | 13.0 | 13.0 | 13.0 | 13.1 | 13.1 | 13.2 | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 | 13.5 | 13.5 | 13.5 |
| Sunrise (AM) | 5:49 | 5:48 | 5:46 | 5:44 | 5:43 | 5:41 | 5:40 | 5:38 | 5:37 | 5:35 | 5:34 | 5:32 | 5:30 | 5:29 | 5:28 | 5:26 | 5:25 | 5:23 | 5:22 | 5:20 | 5:19 | 5:17 | 5:16 | 5:15 | 5:13 | 5:12 | 5:11 | 5:09 | 5:08 | 5:07 |
| Sunset (PM) | 6:11 | 6:12 | 6:13 | 6:14 | 6:15 | 6:16 | 6:17 | 6:18 | 6:19 | 6:20 | 6:21 | 6:22 | 6:23 | 6:24 | 6:25 | 6:26 | 6:27 | 6:28 | 6:29 | 6:29 | 6:30 | 6:31 | 6:32 | 6:33 | 6:34 | 6:35 | 6:36 | 6:37 | 6:38 | 6:39 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.4 | 5:49 | 6:11 |
| 2 | 12.4 | 5:48 | 6:12 |
| 3 | 12.5 | 5:46 | 6:13 |
| 4 | 12.5 | 5:44 | 6:14 |
| 5 | 12.5 | 5:43 | 6:15 |
| 6 | 12.6 | 5:41 | 6:16 |
| 7 | 12.6 | 5:40 | 6:17 |
| 8 | 12.7 | 5:38 | 6:18 |
| 9 | 12.7 | 5:37 | 6:19 |
| 10 | 12.7 | 5:35 | 6:20 |
| 11 | 12.8 | 5:34 | 6:21 |
| 12 | 12.8 | 5:32 | 6:22 |
| 13 | 12.9 | 5:30 | 6:23 |
| 14 | 12.9 | 5:29 | 6:24 |
| 15 | 13.0 | 5:28 | 6:25 |
| 16 | 13.0 | 5:26 | 6:26 |
| 17 | 13.0 | 5:25 | 6:27 |
| 18 | 13.1 | 5:23 | 6:28 |
| 19 | 13.1 | 5:22 | 6:29 |
| 20 | 13.2 | 5:20 | 6:29 |
| 21 | 13.2 | 5:19 | 6:30 |
| 22 | 13.2 | 5:17 | 6:31 |
| 23 | 13.3 | 5:16 | 6:32 |
| 24 | 13.3 | 5:15 | 6:33 |
| 25 | 13.3 | 5:13 | 6:34 |
| 26 | 13.4 | 5:12 | 6:35 |
| 27 | 13.4 | 5:11 | 6:36 |
| 28 | 13.5 | 5:09 | 6:37 |
| 29 | 13.5 | 5:08 | 6:38 |
| 30 | 13.5 | 5:07 | 6:39 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 5.25 kWh/m².
For context, solar energy here swings from a low near 1.9 kWh/m² to a high of 6.46 kWh/m² in June across the year — April's 5.25 kWh/m² falls in the middle.
| 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) | 4.8 | 4.8 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 |
| 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 |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.8 | Bright |
| 2 | 4.8 | Bright |
| 3 | 4.9 | Bright |
| 4 | 4.9 | Bright |
| 5 | 5.0 | Bright |
| 6 | 5.0 | Bright |
| 7 | 5.0 | Bright |
| 8 | 5.1 | Bright |
| 9 | 5.1 | Bright |
| 10 | 5.1 | Bright |
| 11 | 5.2 | Bright |
| 12 | 5.2 | Bright |
| 13 | 5.2 | Bright |
| 14 | 5.2 | Bright |
| 15 | 5.2 | Bright |
| 16 | 5.2 | Bright |
| 17 | 5.3 | Bright |
| 18 | 5.3 | Bright |
| 19 | 5.3 | Bright |
| 20 | 5.3 | Bright |
| 21 | 5.3 | Bright |
| 22 | 5.3 | Bright |
| 23 | 5.3 | Bright |
| 24 | 5.3 | Bright |
| 25 | 5.3 | Bright |
| 26 | 5.3 | Bright |
| 27 | 5.4 | Bright |
| 28 | 5.4 | Bright |
| 29 | 5.4 | Bright |
| 30 | 5.4 | Bright |
Is April a good time to visit Mount Vernon?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a reasonable time to visit Mount Vernon for sightseeing.
What to pack for Mount Vernon in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Mount Vernon sees daytime highs around 67°F and nights near 49°F. Worth packing: rain gear and sun protection. About 11 days see rain.
UV index in Mount Vernon in April
Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mount Vernon peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).
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 | Moderate | Moderate | High | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 5 | High |
| 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 Mount Vernon in April
Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.
Air quality in Mount Vernon is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (October, 8 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 | 12 | 11 | 14 | 16 | 18 | 14 | 11 | 8 | 8 | 9 |
| 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 | 12 | Good |
| Apr | 11 | Good |
| May | 14 | Moderate |
| Jun | 16 | Moderate |
| Jul | 18 | Moderate |
| Aug | 14 | Moderate |
| Sep | 11 | Good |
| Oct | 8 | Good |
| Nov | 8 | Good |
| Dec | 9 | Good |
Where is Mount Vernon?
Mount Vernon sits at 38.3°N, 88.9°W, 512 ft above sea level, in United States. The nearest listed city is Marion, 40 mi away.
Topography around Mount Vernon
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Mount Vernon.
Within 2 miles, the terrain around Mount Vernon has only modest variations in elevation — a maximum elevation change of 174 ft around an average of 489 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 279 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 499 ft.
The land around Mount Vernon is covered by trees (49%) within 2 miles, trees (42%) and cropland (37%) within 10 miles, and cropland (59%) and trees (31%) 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 Mount Vernon (38.3173°, -88.9031°, elevation 512 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. 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).