Fairview Heights weather in May
In May, Fairview Heights sees average daytime highs of 76°F and overnight lows near 58°F, with 5.1 in of rain across 13.3 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.
Highs climb over the month, from about 72°F in the first days to 80°F by the end. The sky is clear or mostly clear about 27% 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 Fairview Heights's 8th-clearest and 8th-windiest month. For the whole year in context, see Fairview Heights's year-round climate.
- Daytime high
- 76°
- 5th warmest
- Overnight low
- 58°
- 8th coldest
- Rainfall
- 5.1 in
- 13.3 wet days
- Daylight
- 14 h 06 min
- 4:53 AM – 6:59 PM
- Cloud cover
- 62%
- 8th clearest
- Wind
- 7 mph
- 8th windiest
- Solar energy
- 5.84 kWh/m²
- Travel score
- 6.3
- out of 10
Fairview Heights is city in St. Clair County, Illinois, United States.
- Density
- 561/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 72°F in the first days to 80°F by the end.
A typical May day in Fairview Heights reaches about 76°F in the afternoon and slips back to 58°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 64°F and 87°F. Set against its neighbours, May runs about 9°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 | 72 | 72 | 73 | 73 | 73 | 74 | 74 | 74 | 74 | 75 | 75 | 75 | 76 | 76 | 76 | 76 | 77 | 77 | 78 | 78 | 78 | 78 | 79 | 79 | 79 | 80 | 80 | 80 | 81 | 81 |
| Avg low (°F) | 53 | 54 | 54 | 54 | 55 | 55 | 56 | 56 | 56 | 56 | 57 | 57 | 58 | 58 | 58 | 58 | 59 | 59 | 59 | 60 | 60 | 60 | 61 | 61 | 62 | 62 | 62 | 63 | 63 | 63 | 64 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 71 | 53 |
| 2 | 72 | 54 |
| 3 | 72 | 54 |
| 4 | 73 | 54 |
| 5 | 73 | 55 |
| 6 | 73 | 55 |
| 7 | 74 | 56 |
| 8 | 74 | 56 |
| 9 | 74 | 56 |
| 10 | 74 | 56 |
| 11 | 75 | 57 |
| 12 | 75 | 57 |
| 13 | 75 | 58 |
| 14 | 76 | 58 |
| 15 | 76 | 58 |
| 16 | 76 | 58 |
| 17 | 76 | 59 |
| 18 | 77 | 59 |
| 19 | 77 | 59 |
| 20 | 78 | 60 |
| 21 | 78 | 60 |
| 22 | 78 | 60 |
| 23 | 78 | 61 |
| 24 | 79 | 61 |
| 25 | 79 | 62 |
| 26 | 79 | 62 |
| 27 | 80 | 62 |
| 28 | 80 | 63 |
| 29 | 80 | 63 |
| 30 | 81 | 63 |
| 31 | 81 | 64 |
How May really feels in Fairview Heights
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.
Fairview Heights weather by month
How May compares with the rest of the year at a glance. May is the 5th-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 | 40° / 25° | 2.9 | 8.3 | 2.9 | 9.6 | 0.0 |
| Feb | 45° / 29° | 2.6 | 7.6 | 2.6 | 10.5 | 1.0 |
| Mar | 56° / 38° | 3.8 | 10.8 | 1.3 | 11.7 | 3.7 |
| Apr | 67° / 48° | 4.8 | 11.5 | 0.1 | 13 | 5.9 |
| May | 76° / 58° | 5.1 | 13.3 | 0 | 14.1 | 6.3 |
| Jun | 85° / 67° | 4.1 | 10.8 | 0 | 14.6 | 5.2 |
| Jul | 88° / 71° | 3.4 | 9.8 | 0 | 14.4 | 4.6 |
| Aug | 86° / 68° | 2.9 | 9.1 | 0 | 13.5 | 5.1 |
| Sep | 80° / 60° | 3.2 | 7.6 | 0 | 12.3 | 7.0 |
| Oct | 68° / 49° | 3.5 | 8.4 | 0 | 11 | 6.7 |
| Nov | 55° / 38° | 3.7 | 8.7 | 0.6 | 9.9 | 3.6 |
| Dec | 44° / 29° | 2.8 | 8.5 | 2 | 9.4 | 0.7 |
Cloud cover in May
The sky is clear or mostly clear about 27% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 58%.
| 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 (%) | 41 | 42 | 41 | 41 | 42 | 41 | 41 | 40 | 41 | 41 | 42 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 40 | 41 | 41 | 41 | 42 | 42 | 41 | 43 | 43 | 43 | 44 | 44 | 45 |
| Cloudier (%) | 59 | 58 | 59 | 59 | 58 | 59 | 59 | 60 | 59 | 59 | 58 | 59 | 59 | 59 | 59 | 59 | 59 | 59 | 60 | 59 | 59 | 59 | 58 | 58 | 59 | 57 | 57 | 57 | 56 | 56 | 55 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 41 | 59 |
| 2 | 42 | 58 |
| 3 | 41 | 59 |
| 4 | 41 | 59 |
| 5 | 42 | 58 |
| 6 | 41 | 59 |
| 7 | 41 | 59 |
| 8 | 40 | 60 |
| 9 | 41 | 59 |
| 10 | 41 | 59 |
| 11 | 42 | 58 |
| 12 | 41 | 59 |
| 13 | 41 | 59 |
| 14 | 41 | 59 |
| 15 | 41 | 59 |
| 16 | 41 | 59 |
| 17 | 41 | 59 |
| 18 | 41 | 59 |
| 19 | 40 | 60 |
| 20 | 41 | 59 |
| 21 | 41 | 59 |
| 22 | 41 | 59 |
| 23 | 42 | 58 |
| 24 | 42 | 58 |
| 25 | 41 | 59 |
| 26 | 43 | 57 |
| 27 | 43 | 57 |
| 28 | 43 | 57 |
| 29 | 44 | 56 |
| 30 | 44 | 56 |
| 31 | 45 | 55 |
Chance of precipitation in May
Fairview Heights gets around 5.1 in of rain over 13.3 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 42% and peaks near 45% on the wettest days. The odds ease 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 45 | 45 | 45 | 45 | 45 | 44 | 44 | 44 | 43 | 43 | 43 | 42 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 43 | 42 | 42 | 42 | 41 | 41 | 40 | 40 | 39 | 39 | 38 | 38 |
| Rain chance (%) | |
|---|---|
| 1 | 45 |
| 2 | 45 |
| 3 | 45 |
| 4 | 45 |
| 5 | 45 |
| 6 | 44 |
| 7 | 44 |
| 8 | 44 |
| 9 | 43 |
| 10 | 43 |
| 11 | 43 |
| 12 | 42 |
| 13 | 42 |
| 14 | 42 |
| 15 | 42 |
| 16 | 42 |
| 17 | 43 |
| 18 | 43 |
| 19 | 43 |
| 20 | 43 |
| 21 | 42 |
| 22 | 42 |
| 23 | 42 |
| 24 | 41 |
| 25 | 41 |
| 26 | 40 |
| 27 | 40 |
| 28 | 39 |
| 29 | 39 |
| 30 | 38 |
| 31 | 38 |
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 49% of days. Sticky, muggy-or-worse air turns up on roughly 15% 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 (%) | 70 | 68 | 66 | 64 | 61 | 60 | 59 | 58 | 57 | 56 | 54 | 54 | 52 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 44 | 43 | 41 | 39 | 38 | 36 | 35 | 33 | 32 | 30 | 29 |
| Comfortable (%) | 18 | 19 | 19 | 19 | 20 | 20 | 19 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 17 | 17 | 18 |
| Humid (%) | 10 | 11 | 12 | 14 | 15 | 16 | 17 | 17 | 18 | 19 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Muggy (%) | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 6 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 14 | 15 | 16 | 18 | 19 | 20 | 21 | 23 | 24 | 24 | 25 | 26 | 27 | 27 | 28 | 29 |
| Oppressive (%) | 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 | 3 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 70 | 18 | 10 | 2 | 0 |
| 2 | 68 | 19 | 11 | 2 | 0 |
| 3 | 66 | 19 | 12 | 3 | 0 |
| 4 | 64 | 19 | 14 | 3 | 0 |
| 5 | 61 | 20 | 15 | 4 | 0 |
| 6 | 60 | 20 | 16 | 4 | 0 |
| 7 | 59 | 19 | 17 | 5 | 0 |
| 8 | 58 | 19 | 17 | 6 | 0 |
| 9 | 57 | 19 | 18 | 6 | 0 |
| 10 | 56 | 18 | 19 | 7 | 0 |
| 11 | 54 | 18 | 20 | 8 | 0 |
| 12 | 54 | 17 | 20 | 9 | 0 |
| 13 | 52 | 17 | 21 | 10 | 0 |
| 14 | 52 | 16 | 21 | 11 | 0 |
| 15 | 51 | 16 | 21 | 12 | 0 |
| 16 | 50 | 15 | 21 | 14 | 0 |
| 17 | 49 | 15 | 21 | 15 | 0 |
| 18 | 48 | 14 | 21 | 16 | 0 |
| 19 | 47 | 14 | 21 | 18 | 1 |
| 20 | 46 | 13 | 22 | 19 | 1 |
| 21 | 44 | 13 | 22 | 20 | 1 |
| 22 | 43 | 13 | 22 | 21 | 1 |
| 23 | 41 | 13 | 22 | 23 | 1 |
| 24 | 39 | 14 | 22 | 24 | 1 |
| 25 | 38 | 14 | 22 | 24 | 2 |
| 26 | 36 | 15 | 22 | 25 | 2 |
| 27 | 35 | 15 | 22 | 26 | 2 |
| 28 | 33 | 16 | 22 | 27 | 2 |
| 29 | 32 | 17 | 22 | 27 | 2 |
| 30 | 30 | 17 | 22 | 28 | 2 |
| 31 | 29 | 18 | 22 | 29 | 3 |
Wind in May
Winds average 7 mph in May.
Across May, daily wind ranges from about 7 mph on the calmest days to 8 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) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | 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 | 8 | light breeze |
| 2 | 8 | light breeze |
| 3 | 8 | light breeze |
| 4 | 8 | light breeze |
| 5 | 8 | light breeze |
| 6 | 8 | light breeze |
| 7 | 8 | light breeze |
| 8 | 7 | light breeze |
| 9 | 7 | light breeze |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 7 | calm |
| 22 | 7 | calm |
| 23 | 7 | calm |
| 24 | 7 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
| 31 | 7 | 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 5:10 AM to 4:43 AM, and sunset from 6:45 PM to 7:11 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 | 14.4 | 14.5 |
| Sunrise (AM) | 5:10 | 5:08 | 5:07 | 5:06 | 5:05 | 5:04 | 5:02 | 5:01 | 5:00 | 4:59 | 4:58 | 4:57 | 4:56 | 4:55 | 4:54 | 4:53 | 4:53 | 4:52 | 4:51 | 4:50 | 4:49 | 4:49 | 4:48 | 4:47 | 4:47 | 4:46 | 4:45 | 4:45 | 4:44 | 4:44 | 4:43 |
| Sunset (PM) | 6:45 | 6:46 | 6:47 | 6:48 | 6:49 | 6:50 | 6:51 | 6:52 | 6:52 | 6:53 | 6:54 | 6:55 | 6:56 | 6:57 | 6:58 | 6:59 | 7:00 | 7:01 | 7:02 | 7:03 | 7:03 | 7:04 | 7:05 | 7:06 | 7:07 | 7:08 | 7:08 | 7:09 | 7:10 | 7:11 | 7:11 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.6 | 5:10 | 6:45 |
| 2 | 13.6 | 5:08 | 6:46 |
| 3 | 13.7 | 5:07 | 6:47 |
| 4 | 13.7 | 5:06 | 6:48 |
| 5 | 13.7 | 5:05 | 6:49 |
| 6 | 13.8 | 5:04 | 6:50 |
| 7 | 13.8 | 5:02 | 6:51 |
| 8 | 13.8 | 5:01 | 6:52 |
| 9 | 13.9 | 5:00 | 6:52 |
| 10 | 13.9 | 4:59 | 6:53 |
| 11 | 13.9 | 4:58 | 6:54 |
| 12 | 14.0 | 4:57 | 6:55 |
| 13 | 14.0 | 4:56 | 6:56 |
| 14 | 14.0 | 4:55 | 6:57 |
| 15 | 14.1 | 4:54 | 6:58 |
| 16 | 14.1 | 4:53 | 6:59 |
| 17 | 14.1 | 4:53 | 7:00 |
| 18 | 14.2 | 4:52 | 7:01 |
| 19 | 14.2 | 4:51 | 7:02 |
| 20 | 14.2 | 4:50 | 7:03 |
| 21 | 14.2 | 4:49 | 7:03 |
| 22 | 14.3 | 4:49 | 7:04 |
| 23 | 14.3 | 4:48 | 7:05 |
| 24 | 14.3 | 4:47 | 7:06 |
| 25 | 14.3 | 4:47 | 7:07 |
| 26 | 14.4 | 4:46 | 7:08 |
| 27 | 14.4 | 4:45 | 7:08 |
| 28 | 14.4 | 4:45 | 7:09 |
| 29 | 14.4 | 4:44 | 7:10 |
| 30 | 14.4 | 4:44 | 7:11 |
| 31 | 14.5 | 4:43 | 7:11 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 5.84 kWh/m².
For context, solar energy here swings from a low near 1.91 kWh/m² to a high of 6.47 kWh/m² in June across the year — May's 5.84 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) | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.7 | 5.7 | 5.7 | 5.8 | 5.8 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 | 5.9 | 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 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.4 | Bright |
| 2 | 5.4 | Bright |
| 3 | 5.5 | Bright |
| 4 | 5.5 | Bright |
| 5 | 5.5 | Bright |
| 6 | 5.6 | Bright |
| 7 | 5.6 | Bright |
| 8 | 5.7 | Bright |
| 9 | 5.7 | Bright |
| 10 | 5.7 | Bright |
| 11 | 5.8 | Bright |
| 12 | 5.8 | Bright |
| 13 | 5.8 | Bright |
| 14 | 5.8 | Bright |
| 15 | 5.9 | Bright |
| 16 | 5.9 | Bright |
| 17 | 5.9 | Bright |
| 18 | 5.9 | Bright |
| 19 | 6.0 | Bright |
| 20 | 6.0 | Bright |
| 21 | 6.0 | Bright |
| 22 | 6.0 | Intense |
| 23 | 6.0 | Intense |
| 24 | 6.0 | Intense |
| 25 | 6.0 | Intense |
| 26 | 6.1 | Intense |
| 27 | 6.1 | Intense |
| 28 | 6.1 | Intense |
| 29 | 6.1 | Intense |
| 30 | 6.1 | Intense |
| 31 | 6.1 | Intense |
Is May a good time to visit Fairview Heights?
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 Fairview Heights for sightseeing.
What to pack for Fairview Heights in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Fairview Heights sees daytime highs around 76°F and nights near 58°F. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.
UV index in Fairview Heights in May
Clear-sky midday UV in May peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Fairview Heights peaks around June 22 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 Fairview Heights 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 Fairview Heights is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.3× 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 | 12 | 12 | 11 | 14 | 16 | 18 | 15 | 12 | 8 | 8 | 9 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 12 | Good |
| Mar | 12 | Good |
| Apr | 11 | Good |
| May | 14 | Moderate |
| Jun | 16 | Moderate |
| Jul | 18 | Moderate |
| Aug | 15 | Moderate |
| Sep | 12 | Moderate |
| Oct | 8 | Good |
| Nov | 8 | Good |
| Dec | 9 | Good |
Where is Fairview Heights?
Fairview Heights sits at 38.6°N, 90.0°W, 584 ft above sea level, in United States. The nearest listed city is O'Fallon, 4.3 mi away.
Topography around Fairview Heights
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Fairview Heights.
Within 2 miles, the terrain around Fairview Heights has only modest variations in elevation — a maximum elevation change of 141 ft around an average of 577 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 358 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 974 ft.
The land around Fairview Heights is covered by trees (46%) and artificial surfaces (22%) within 2 miles, trees (40%) and cropland (31%) within 10 miles, and cropland (46%) and trees (41%) 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 Fairview Heights (38.5889°, -89.9904°, elevation 584 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).