Belvidere weather in September
In September, Belvidere sees average daytime highs of 73°F and overnight lows near 54°F, with 3.2 in of rain across 8.6 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.
Highs ease over the month, from about 78°F in the first days to 68°F by the end. The sky is clear or mostly clear about 42% of the time in September, and the air most often feels dry.
Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Belvidere's 1st-clearest and 9th-windiest month. For the whole year in context, see Belvidere's year-round climate.
- Daytime high
- 73°
- 4th warmest
- Overnight low
- 54°
- 9th coldest
- Rainfall
- 3.2 in
- 8.6 wet days
- Daylight
- 12 h 18 min
- 5:41 AM – 5:58 PM
- Cloud cover
- 50%
- 1st clearest
- Wind
- 7 mph
- 9th windiest
- Solar energy
- 4.4 kWh/m²
- Travel score
- 7.0
- out of 10
Belvidere is city in Illinois, United States.
- Density
- 788/km²
- people per km²
- Founded
- 1835
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 78°F in the first days to 68°F by the end.
A typical September day in Belvidere reaches about 73°F in the afternoon and slips back to 54°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 62°F and 83°F. Set against its neighbours, September runs about 6°F cooler than August and about 13°F warmer than October.
| 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) | 78 | 78 | 78 | 77 | 77 | 77 | 76 | 76 | 76 | 75 | 75 | 75 | 74 | 74 | 74 | 73 | 73 | 72 | 72 | 72 | 71 | 71 | 70 | 70 | 69 | 69 | 69 | 68 | 68 | 67 |
| Avg low (°F) | 60 | 59 | 59 | 59 | 58 | 58 | 57 | 57 | 57 | 56 | 56 | 56 | 55 | 55 | 54 | 54 | 54 | 53 | 53 | 52 | 52 | 52 | 51 | 51 | 50 | 50 | 49 | 49 | 49 | 48 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 78 | 60 |
| 2 | 78 | 59 |
| 3 | 78 | 59 |
| 4 | 77 | 59 |
| 5 | 77 | 58 |
| 6 | 77 | 58 |
| 7 | 76 | 57 |
| 8 | 76 | 57 |
| 9 | 76 | 57 |
| 10 | 75 | 56 |
| 11 | 75 | 56 |
| 12 | 75 | 56 |
| 13 | 74 | 55 |
| 14 | 74 | 55 |
| 15 | 74 | 54 |
| 16 | 73 | 54 |
| 17 | 73 | 54 |
| 18 | 72 | 53 |
| 19 | 72 | 53 |
| 20 | 72 | 52 |
| 21 | 71 | 52 |
| 22 | 71 | 52 |
| 23 | 70 | 51 |
| 24 | 70 | 51 |
| 25 | 69 | 50 |
| 26 | 69 | 50 |
| 27 | 69 | 49 |
| 28 | 68 | 49 |
| 29 | 68 | 49 |
| 30 | 67 | 48 |
How September really feels in Belvidere
Once humidity and wind are folded in, September 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.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Belvidere weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 29° / 15° | 1.9 | 7.7 | 5.8 | 9.3 | 0.0 |
| Feb | 33° / 19° | 1.8 | 7.2 | 5.1 | 10.3 | 0.0 |
| Mar | 45° / 29° | 2.5 | 9.4 | 3.3 | 11.6 | 1.2 |
| Apr | 58° / 39° | 4.2 | 12 | 1 | 13.1 | 3.9 |
| May | 69° / 50° | 4.4 | 12.5 | 0 | 14.4 | 5.9 |
| Jun | 78° / 60° | 3.9 | 11.7 | 0 | 15 | 6.4 |
| Jul | 82° / 64° | 3.4 | 10.2 | 0 | 14.8 | 6.4 |
| Aug | 80° / 62° | 3.4 | 9.7 | 0 | 13.7 | 6.7 |
| Sep | 73° / 54° | 3.2 | 8.6 | 0 | 12.3 | 7.0 |
| Oct | 60° / 42° | 3.0 | 8.8 | 0.1 | 10.8 | 5.0 |
| Nov | 46° / 31° | 2.4 | 7.9 | 1.8 | 9.6 | 1.3 |
| Dec | 34° / 21° | 2.1 | 7.8 | 4.8 | 9 | 0.0 |
Cloud cover in September
The sky is clear or mostly clear about 42% of the time in September, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 43%.
| 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 (%) | 59 | 59 | 60 | 61 | 61 | 61 | 61 | 60 | 61 | 60 | 60 | 59 | 59 | 58 | 58 | 56 | 56 | 55 | 55 | 55 | 55 | 53 | 53 | 53 | 53 | 52 | 52 | 52 | 52 | 52 |
| Cloudier (%) | 41 | 41 | 40 | 39 | 39 | 39 | 39 | 40 | 39 | 40 | 40 | 41 | 41 | 42 | 42 | 44 | 44 | 45 | 45 | 45 | 45 | 47 | 47 | 47 | 47 | 48 | 48 | 48 | 48 | 48 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 59 | 41 |
| 2 | 59 | 41 |
| 3 | 60 | 40 |
| 4 | 61 | 39 |
| 5 | 61 | 39 |
| 6 | 61 | 39 |
| 7 | 61 | 39 |
| 8 | 60 | 40 |
| 9 | 61 | 39 |
| 10 | 60 | 40 |
| 11 | 60 | 40 |
| 12 | 59 | 41 |
| 13 | 59 | 41 |
| 14 | 58 | 42 |
| 15 | 58 | 42 |
| 16 | 56 | 44 |
| 17 | 56 | 44 |
| 18 | 55 | 45 |
| 19 | 55 | 45 |
| 20 | 55 | 45 |
| 21 | 55 | 45 |
| 22 | 53 | 47 |
| 23 | 53 | 47 |
| 24 | 53 | 47 |
| 25 | 53 | 47 |
| 26 | 52 | 48 |
| 27 | 52 | 48 |
| 28 | 52 | 48 |
| 29 | 52 | 48 |
| 30 | 52 | 48 |
Chance of precipitation in September
Belvidere gets around 3.2 in of rain over 8.6 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 29% and peaks near 30% 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 (%) | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 |
| Rain chance (%) | |
|---|---|
| 1 | 27 |
| 2 | 27 |
| 3 | 27 |
| 4 | 27 |
| 5 | 27 |
| 6 | 28 |
| 7 | 28 |
| 8 | 28 |
| 9 | 28 |
| 10 | 28 |
| 11 | 29 |
| 12 | 29 |
| 13 | 30 |
| 14 | 30 |
| 15 | 30 |
| 16 | 30 |
| 17 | 30 |
| 18 | 30 |
| 19 | 30 |
| 20 | 30 |
| 21 | 30 |
| 22 | 30 |
| 23 | 30 |
| 24 | 30 |
| 25 | 30 |
| 26 | 30 |
| 27 | 30 |
| 28 | 29 |
| 29 | 29 |
| 30 | 29 |
Humidity in September
Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the dry band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 12% 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 | 28 | 29 | 31 | 33 | 35 | 37 | 39 | 40 | 42 | 44 | 46 | 48 | 51 | 51 | 54 | 56 | 59 | 60 | 62 | 65 | 66 | 68 | 70 | 72 | 73 | 75 | 76 | 77 | 79 |
| Comfortable (%) | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 26 | 26 | 25 | 24 | 23 | 23 | 22 | 21 | 20 | 20 | 19 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 14 | 13 | 12 |
| Humid (%) | 22 | 21 | 21 | 20 | 19 | 19 | 18 | 17 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 10 | 10 | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 6 |
| Muggy (%) | 19 | 18 | 17 | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 10 | 10 | 9 | 8 | 8 | 7 | 7 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 |
| Oppressive (%) | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 26 | 27 | 22 | 19 | 6 |
| 2 | 28 | 28 | 21 | 18 | 6 |
| 3 | 29 | 28 | 21 | 17 | 5 |
| 4 | 31 | 28 | 20 | 16 | 5 |
| 5 | 33 | 28 | 19 | 15 | 4 |
| 6 | 35 | 28 | 19 | 15 | 4 |
| 7 | 37 | 28 | 18 | 14 | 3 |
| 8 | 39 | 28 | 17 | 14 | 3 |
| 9 | 40 | 27 | 17 | 13 | 2 |
| 10 | 42 | 26 | 16 | 13 | 2 |
| 11 | 44 | 26 | 16 | 13 | 2 |
| 12 | 46 | 25 | 15 | 12 | 1 |
| 13 | 48 | 24 | 15 | 12 | 1 |
| 14 | 51 | 23 | 14 | 11 | 1 |
| 15 | 51 | 23 | 14 | 11 | 1 |
| 16 | 54 | 22 | 13 | 10 | 1 |
| 17 | 56 | 21 | 13 | 10 | 0 |
| 18 | 59 | 20 | 12 | 9 | 0 |
| 19 | 60 | 20 | 12 | 8 | 0 |
| 20 | 62 | 19 | 11 | 8 | 0 |
| 21 | 65 | 18 | 10 | 7 | 0 |
| 22 | 66 | 17 | 10 | 7 | 0 |
| 23 | 68 | 17 | 9 | 6 | 0 |
| 24 | 70 | 16 | 9 | 5 | 0 |
| 25 | 72 | 15 | 8 | 5 | 0 |
| 26 | 73 | 15 | 8 | 4 | 0 |
| 27 | 75 | 14 | 7 | 4 | 0 |
| 28 | 76 | 14 | 7 | 3 | 0 |
| 29 | 77 | 13 | 7 | 3 | 0 |
| 30 | 79 | 12 | 6 | 3 | 0 |
Wind in September
Winds average 7 mph in September.
Across September, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | 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 | 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 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | light breeze |
| 18 | 7 | light breeze |
| 19 | 8 | light breeze |
| 20 | 8 | 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 September
Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 84 minutes over September. Sunrise moves from 5:25 AM to 5:57 AM, and sunset from 6:25 PM to 5:33 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) | 13.0 | 13.0 | 12.9 | 12.9 | 12.8 | 12.8 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.8 | 11.8 | 11.7 | 11.7 | 11.6 | 11.6 |
| Sunrise (AM) | 5:25 | 5:26 | 5:27 | 5:28 | 5:29 | 5:30 | 5:32 | 5:33 | 5:34 | 5:35 | 5:36 | 5:37 | 5:38 | 5:39 | 5:40 | 5:41 | 5:42 | 5:43 | 5:45 | 5:46 | 5:47 | 5:48 | 5:49 | 5:50 | 5:51 | 5:52 | 5:53 | 5:55 | 5:56 | 5:57 |
| Sunset (PM) | 6:25 | 6:23 | 6:22 | 6:20 | 6:18 | 6:16 | 6:15 | 6:13 | 6:11 | 6:09 | 6:07 | 6:05 | 6:04 | 6:02 | 6:00 | 5:58 | 5:56 | 5:54 | 5:53 | 5:51 | 5:49 | 5:47 | 5:45 | 5:43 | 5:42 | 5:40 | 5:38 | 5:36 | 5:34 | 5:33 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.0 | 5:25 | 6:25 |
| 2 | 13.0 | 5:26 | 6:23 |
| 3 | 12.9 | 5:27 | 6:22 |
| 4 | 12.9 | 5:28 | 6:20 |
| 5 | 12.8 | 5:29 | 6:18 |
| 6 | 12.8 | 5:30 | 6:16 |
| 7 | 12.7 | 5:32 | 6:15 |
| 8 | 12.7 | 5:33 | 6:13 |
| 9 | 12.6 | 5:34 | 6:11 |
| 10 | 12.6 | 5:35 | 6:09 |
| 11 | 12.5 | 5:36 | 6:07 |
| 12 | 12.5 | 5:37 | 6:05 |
| 13 | 12.4 | 5:38 | 6:04 |
| 14 | 12.4 | 5:39 | 6:02 |
| 15 | 12.3 | 5:40 | 6:00 |
| 16 | 12.3 | 5:41 | 5:58 |
| 17 | 12.2 | 5:42 | 5:56 |
| 18 | 12.2 | 5:43 | 5:54 |
| 19 | 12.1 | 5:45 | 5:53 |
| 20 | 12.1 | 5:46 | 5:51 |
| 21 | 12.0 | 5:47 | 5:49 |
| 22 | 12.0 | 5:48 | 5:47 |
| 23 | 11.9 | 5:49 | 5:45 |
| 24 | 11.9 | 5:50 | 5:43 |
| 25 | 11.8 | 5:51 | 5:42 |
| 26 | 11.8 | 5:52 | 5:40 |
| 27 | 11.7 | 5:53 | 5:38 |
| 28 | 11.7 | 5:55 | 5:36 |
| 29 | 11.6 | 5:56 | 5:34 |
| 30 | 11.6 | 5:57 | 5:33 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.4 kWh/m².
For context, solar energy here swings from a low near 1.65 kWh/m² to a high of 6.29 kWh/m² in June across the year — September's 4.4 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) | 5.0 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.5 | 4.5 | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.1 | 4.1 | 4.1 | 4.0 | 4.0 | 3.9 | 3.9 | 3.9 | 3.8 | 3.8 |
| 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 | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.0 | Bright |
| 2 | 4.9 | Bright |
| 3 | 4.9 | Bright |
| 4 | 4.8 | Bright |
| 5 | 4.8 | Bright |
| 6 | 4.8 | Bright |
| 7 | 4.7 | Bright |
| 8 | 4.7 | Bright |
| 9 | 4.7 | Bright |
| 10 | 4.6 | Bright |
| 11 | 4.6 | Bright |
| 12 | 4.5 | Bright |
| 13 | 4.5 | Bright |
| 14 | 4.4 | Bright |
| 15 | 4.4 | Bright |
| 16 | 4.3 | Bright |
| 17 | 4.3 | Bright |
| 18 | 4.3 | Bright |
| 19 | 4.2 | Bright |
| 20 | 4.2 | Bright |
| 21 | 4.1 | Bright |
| 22 | 4.1 | Bright |
| 23 | 4.1 | Bright |
| 24 | 4.0 | Bright |
| 25 | 4.0 | Moderate |
| 26 | 3.9 | Moderate |
| 27 | 3.9 | Moderate |
| 28 | 3.9 | Moderate |
| 29 | 3.8 | Moderate |
| 30 | 3.8 | Moderate |
Is September a good time to visit Belvidere?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is one of the better times to visit Belvidere for general sightseeing.
What to pack for Belvidere in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Belvidere sees daytime highs around 73°F and nights near 54°F. Worth packing: light clothes and rain gear. About 9 days see rain.
UV index in Belvidere in September
Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Belvidere peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 4 | 6 | 8 | 9 | 8 | 8 | 6 | 3 | 2 | 1 |
| 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 | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in Belvidere in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Belvidere is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 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) | 12 | 15 | 16 | 14 | 15 | 16 | 17 | 16 | 13 | 9 | 10 | 11 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 12 | Moderate |
| Feb | 15 | Moderate |
| Mar | 16 | Moderate |
| Apr | 14 | Moderate |
| May | 15 | Moderate |
| Jun | 16 | Moderate |
| Jul | 17 | Moderate |
| Aug | 16 | Moderate |
| Sep | 13 | Moderate |
| Oct | 9 | Good |
| Nov | 10 | Good |
| Dec | 11 | Good |
Where is Belvidere?
Belvidere sits at 42.3°N, 88.8°W, 781 ft above sea level, in United States. The nearest listed city is Machesney Park, 11 mi away.
Topography around Belvidere
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Belvidere.
Within 2 miles, the terrain around Belvidere has only modest variations in elevation — a maximum elevation change of 131 ft around an average of 784 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 325 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 679 ft.
The land around Belvidere is covered by cropland (27%), artificial surfaces (25%) and grassland (24%) within 2 miles, cropland (62%) within 10 miles, and cropland (60%) and trees (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 Belvidere (42.2639°, -88.8443°, elevation 781 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).