Deerfield weather in April
In April, Deerfield sees average daytime highs of 46°F and overnight lows near 39°F, with 4.8 in of precipitation across 12 wet days and about 13.1 hours of daylight. It is the 7th-warmest and 1st-wettest month of the year here.
Highs climb over the month, from about 43°F in the first days to 50°F by the end. The sky is clear or mostly clear about 26% 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 48 min by month's end. Set against the rest of the year, April is Deerfield's 8th-clearest and 5th-windiest month. For the whole year in context, see Deerfield's year-round climate.
- Daytime high
- 46°
- 7th warmest
- Overnight low
- 39°
- 6th coldest
- Precipitation
- 4.8 in
- 12 wet days
- Daylight
- 13 h 06 min
- 5:17 AM – 6:26 PM
- Cloud cover
- 65%
- 8th clearest
- Wind
- 13 mph
- 5th windiest
- Solar energy
- 5.06 kWh/m²
- Travel score
- 1.3
- out of 10
Deerfield is village in Illinois, United States.
- Founded
- 1903
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Highs climb over the month, from about 43°F in the first days to 50°F by the end.
A typical April day in Deerfield reaches about 46°F in the afternoon and slips back to 39°F overnight — a 7°F spread between the day's warmth and the night's chill. On most days the high lands between 38°F and 56°F. Set against its neighbours, April runs about 9°F warmer than March and about 12°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) | 42 | 42 | 43 | 43 | 43 | 44 | 44 | 44 | 44 | 45 | 45 | 45 | 46 | 46 | 46 | 46 | 47 | 47 | 47 | 47 | 48 | 48 | 48 | 49 | 49 | 49 | 50 | 50 | 50 | 51 |
| Avg low (°F) | 34 | 35 | 35 | 35 | 36 | 36 | 36 | 37 | 37 | 37 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 40 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 42 | 43 | 43 | 43 | 44 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 42 | 34 |
| 2 | 42 | 35 |
| 3 | 43 | 35 |
| 4 | 43 | 35 |
| 5 | 43 | 36 |
| 6 | 44 | 36 |
| 7 | 44 | 36 |
| 8 | 44 | 37 |
| 9 | 44 | 37 |
| 10 | 45 | 37 |
| 11 | 45 | 38 |
| 12 | 45 | 38 |
| 13 | 46 | 38 |
| 14 | 46 | 38 |
| 15 | 46 | 39 |
| 16 | 46 | 39 |
| 17 | 47 | 39 |
| 18 | 47 | 40 |
| 19 | 47 | 40 |
| 20 | 47 | 40 |
| 21 | 48 | 41 |
| 22 | 48 | 41 |
| 23 | 48 | 41 |
| 24 | 49 | 42 |
| 25 | 49 | 42 |
| 26 | 49 | 42 |
| 27 | 50 | 43 |
| 28 | 50 | 43 |
| 29 | 50 | 43 |
| 30 | 51 | 44 |
How April really feels in Deerfield
Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 17 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
The story in April is cold — wind chill drags the overnight "feels like" below the raw low.
Deerfield 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 | 30° / 21° | 2.9 | 9.8 | 7 | 9.3 | 0.0 |
| Feb | 31° / 21° | 2.4 | 7.7 | 5.1 | 10.3 | 0.0 |
| Mar | 37° / 29° | 3.0 | 9.8 | 3.2 | 11.6 | 0.0 |
| Apr | 46° / 39° | 4.8 | 12 | 1.4 | 13.1 | 1.3 |
| May | 58° / 50° | 4.1 | 11.7 | 0 | 14.4 | 4.1 |
| Jun | 71° / 64° | 3.5 | 10.5 | 0 | 15 | 6.5 |
| Jul | 78° / 70° | 3.1 | 10.5 | 0 | 14.8 | 6.8 |
| Aug | 77° / 70° | 3.8 | 10.7 | 0 | 13.7 | 7.0 |
| Sep | 71° / 63° | 3.3 | 9.5 | 0 | 12.3 | 6.8 |
| Oct | 58° / 51° | 4.0 | 10.5 | 0.1 | 10.8 | 4.4 |
| Nov | 46° / 39° | 3.4 | 10 | 1.3 | 9.6 | 1.2 |
| Dec | 36° / 28° | 3.1 | 10 | 4.9 | 9 | 0.0 |
Cloud cover in April
The sky is clear or mostly clear about 26% 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 61%.
| 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 (%) | 36 | 36 | 37 | 37 | 38 | 37 | 37 | 38 | 38 | 37 | 39 | 39 | 39 | 40 | 39 | 39 | 39 | 40 | 40 | 40 | 40 | 41 | 40 | 39 | 39 | 39 | 39 | 39 | 39 | 38 |
| Cloudier (%) | 64 | 64 | 63 | 63 | 62 | 63 | 63 | 62 | 62 | 63 | 61 | 61 | 61 | 60 | 61 | 61 | 61 | 60 | 60 | 60 | 60 | 59 | 60 | 61 | 61 | 61 | 61 | 61 | 61 | 62 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 36 | 64 |
| 2 | 36 | 64 |
| 3 | 37 | 63 |
| 4 | 37 | 63 |
| 5 | 38 | 62 |
| 6 | 37 | 63 |
| 7 | 37 | 63 |
| 8 | 38 | 62 |
| 9 | 38 | 62 |
| 10 | 37 | 63 |
| 11 | 39 | 61 |
| 12 | 39 | 61 |
| 13 | 39 | 61 |
| 14 | 40 | 60 |
| 15 | 39 | 61 |
| 16 | 39 | 61 |
| 17 | 39 | 61 |
| 18 | 40 | 60 |
| 19 | 40 | 60 |
| 20 | 40 | 60 |
| 21 | 40 | 60 |
| 22 | 41 | 59 |
| 23 | 40 | 60 |
| 24 | 39 | 61 |
| 25 | 39 | 61 |
| 26 | 39 | 61 |
| 27 | 39 | 61 |
| 28 | 39 | 61 |
| 29 | 39 | 61 |
| 30 | 38 | 62 |
Chance of precipitation in April
Deerfield gets around 4.8 in of rain and snow over 12 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 39% and peaks near 41% on the wettest days, and about 1 day brings snow.
| 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 | 38 | 39 | 39 | 40 | 40 | 40 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 38 |
| Snow chance (%) | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 37 | 6 |
| 2 | 37 | 6 |
| 3 | 38 | 6 |
| 4 | 39 | 6 |
| 5 | 39 | 7 |
| 6 | 40 | 7 |
| 7 | 40 | 7 |
| 8 | 40 | 7 |
| 9 | 41 | 7 |
| 10 | 41 | 7 |
| 11 | 41 | 7 |
| 12 | 41 | 6 |
| 13 | 41 | 6 |
| 14 | 41 | 6 |
| 15 | 41 | 5 |
| 16 | 41 | 5 |
| 17 | 40 | 4 |
| 18 | 40 | 4 |
| 19 | 40 | 3 |
| 20 | 39 | 3 |
| 21 | 39 | 2 |
| 22 | 39 | 2 |
| 23 | 39 | 2 |
| 24 | 39 | 1 |
| 25 | 39 | 1 |
| 26 | 39 | 1 |
| 27 | 38 | 1 |
| 28 | 38 | 1 |
| 29 | 38 | 1 |
| 30 | 38 | 1 |
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 100% 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 (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 99 | 99 | 98 |
| Comfortable (%) | 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 | 2 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 100 | 0 |
| 2 | 100 | 0 |
| 3 | 100 | 0 |
| 4 | 100 | 0 |
| 5 | 100 | 0 |
| 6 | 100 | 0 |
| 7 | 100 | 0 |
| 8 | 100 | 0 |
| 9 | 100 | 0 |
| 10 | 100 | 0 |
| 11 | 100 | 0 |
| 12 | 100 | 0 |
| 13 | 100 | 0 |
| 14 | 100 | 0 |
| 15 | 100 | 0 |
| 16 | 100 | 0 |
| 17 | 100 | 0 |
| 18 | 100 | 0 |
| 19 | 100 | 0 |
| 20 | 100 | 0 |
| 21 | 100 | 0 |
| 22 | 100 | 0 |
| 23 | 100 | 0 |
| 24 | 100 | 0 |
| 25 | 100 | 0 |
| 26 | 99 | 1 |
| 27 | 99 | 1 |
| 28 | 99 | 1 |
| 29 | 99 | 1 |
| 30 | 98 | 2 |
Wind in April
Winds average 13 mph in April.
Across April, daily wind ranges from about 12 mph on the calmest days to 13 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) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 13 | breezy |
| 2 | 13 | breezy |
| 3 | 13 | breezy |
| 4 | 13 | breezy |
| 5 | 13 | breezy |
| 6 | 13 | breezy |
| 7 | 13 | breezy |
| 8 | 13 | breezy |
| 9 | 13 | breezy |
| 10 | 13 | breezy |
| 11 | 13 | breezy |
| 12 | 13 | breezy |
| 13 | 13 | breezy |
| 14 | 13 | breezy |
| 15 | 13 | breezy |
| 16 | 13 | breezy |
| 17 | 13 | breezy |
| 18 | 13 | breezy |
| 19 | 13 | breezy |
| 20 | 13 | breezy |
| 21 | 13 | breezy |
| 22 | 13 | breezy |
| 23 | 13 | breezy |
| 24 | 12 | breezy |
| 25 | 12 | breezy |
| 26 | 12 | breezy |
| 27 | 12 | light breeze |
| 28 | 12 | light breeze |
| 29 | 12 | light breeze |
| 30 | 12 | light breeze |
Sunrise & sunset in April
Daylight runs from about 12 h 24 min at the start of April to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 84 minutes over April. Sunrise moves from 5:43 AM to 4:56 AM, and sunset from 6:09 PM to 6:42 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 | 12.5 | 12.5 | 12.6 | 12.6 | 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 | 13.3 | 13.3 | 13.4 | 13.4 | 13.5 | 13.5 | 13.5 | 13.6 | 13.6 | 13.7 | 13.7 | 13.8 |
| Sunrise (AM) | 5:43 | 5:41 | 5:40 | 5:38 | 5:36 | 5:34 | 5:33 | 5:31 | 5:29 | 5:28 | 5:26 | 5:24 | 5:22 | 5:21 | 5:19 | 5:17 | 5:16 | 5:14 | 5:13 | 5:11 | 5:09 | 5:08 | 5:06 | 5:05 | 5:03 | 5:02 | 5:00 | 4:59 | 4:57 | 4:56 |
| Sunset (PM) | 6:09 | 6:10 | 6:11 | 6:12 | 6:13 | 6:14 | 6:16 | 6:17 | 6:18 | 6:19 | 6:20 | 6:21 | 6:22 | 6:24 | 6:25 | 6:26 | 6:27 | 6:28 | 6:29 | 6:30 | 6:31 | 6:33 | 6:34 | 6:35 | 6:36 | 6:37 | 6:38 | 6:39 | 6:41 | 6:42 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.4 | 5:43 | 6:09 |
| 2 | 12.5 | 5:41 | 6:10 |
| 3 | 12.5 | 5:40 | 6:11 |
| 4 | 12.6 | 5:38 | 6:12 |
| 5 | 12.6 | 5:36 | 6:13 |
| 6 | 12.7 | 5:34 | 6:14 |
| 7 | 12.7 | 5:33 | 6:16 |
| 8 | 12.8 | 5:31 | 6:17 |
| 9 | 12.8 | 5:29 | 6:18 |
| 10 | 12.9 | 5:28 | 6:19 |
| 11 | 12.9 | 5:26 | 6:20 |
| 12 | 13.0 | 5:24 | 6:21 |
| 13 | 13.0 | 5:22 | 6:22 |
| 14 | 13.0 | 5:21 | 6:24 |
| 15 | 13.1 | 5:19 | 6:25 |
| 16 | 13.1 | 5:17 | 6:26 |
| 17 | 13.2 | 5:16 | 6:27 |
| 18 | 13.2 | 5:14 | 6:28 |
| 19 | 13.3 | 5:13 | 6:29 |
| 20 | 13.3 | 5:11 | 6:30 |
| 21 | 13.4 | 5:09 | 6:31 |
| 22 | 13.4 | 5:08 | 6:33 |
| 23 | 13.5 | 5:06 | 6:34 |
| 24 | 13.5 | 5:05 | 6:35 |
| 25 | 13.5 | 5:03 | 6:36 |
| 26 | 13.6 | 5:02 | 6:37 |
| 27 | 13.6 | 5:00 | 6:38 |
| 28 | 13.7 | 4:59 | 6:39 |
| 29 | 13.7 | 4:57 | 6:41 |
| 30 | 13.8 | 4:56 | 6:42 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 5.06 kWh/m².
For context, solar energy here swings from a low near 1.48 kWh/m² to a high of 6.5 kWh/m² in June across the year — April's 5.06 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) | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 |
| 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 | 4.6 | Bright |
| 2 | 4.6 | Bright |
| 3 | 4.7 | Bright |
| 4 | 4.7 | Bright |
| 5 | 4.7 | Bright |
| 6 | 4.8 | Bright |
| 7 | 4.8 | Bright |
| 8 | 4.8 | Bright |
| 9 | 4.8 | Bright |
| 10 | 4.9 | Bright |
| 11 | 4.9 | Bright |
| 12 | 4.9 | Bright |
| 13 | 5.0 | Bright |
| 14 | 5.0 | Bright |
| 15 | 5.1 | Bright |
| 16 | 5.1 | Bright |
| 17 | 5.1 | Bright |
| 18 | 5.2 | Bright |
| 19 | 5.2 | Bright |
| 20 | 5.2 | Bright |
| 21 | 5.3 | Bright |
| 22 | 5.3 | Bright |
| 23 | 5.3 | Bright |
| 24 | 5.3 | Bright |
| 25 | 5.4 | Bright |
| 26 | 5.4 | Bright |
| 27 | 5.4 | Bright |
| 28 | 5.4 | Bright |
| 29 | 5.5 | Bright |
| 30 | 5.5 | Bright |
Is April a good time to visit Deerfield?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a weaker month for outdoor sightseeing in Deerfield.
What to pack for Deerfield in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Deerfield sees daytime highs around 46°F and nights near 39°F. Pack a warm layer. Worth having: a heavy coat, rain gear, sun protection and a windbreaker. About 12 days see rain.
Sea temperature near Deerfield in April
The nearest coast averages about 39°F in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 12 mi away) is warmest in August at about 72°F and coldest in February near 36°F.
It's comfortable for a long swim from Jul 14 to Sep 14 — about 2.1 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 38 | 36 | 36 | 39 | 44 | 56 | 69 | 72 | 68 | 58 | 48 | 42 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Refreshing | Refreshing | Refreshing | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 38 | Bracing |
| Feb | 36 | Bracing |
| Mar | 36 | Bracing |
| Apr | 39 | Bracing |
| May | 44 | Bracing |
| Jun | 56 | Bracing |
| Jul | 69 | Refreshing |
| Aug | 72 | Refreshing |
| Sep | 68 | Refreshing |
| Oct | 58 | Bracing |
| Nov | 48 | Bracing |
| Dec | 42 | Bracing |
UV index in Deerfield in April
Clear-sky midday UV in April 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 Deerfield peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (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 | 3 | 4 | 6 | 7 | 9 | 9 | 8 | 6 | 3 | 2 | 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 | 4 | Moderate |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in Deerfield 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 Deerfield is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 10 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 | 18 | 19 | 20 | 21 | 21 | 18 | 15 | 10 | 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 | 18 | Moderate |
| Apr | 19 | Moderate |
| May | 20 | Moderate |
| Jun | 21 | Moderate |
| Jul | 21 | Moderate |
| Aug | 18 | Moderate |
| Sep | 15 | Moderate |
| Oct | 10 | Good |
| Nov | 10 | Good |
| Dec | 11 | Good |
Where is Deerfield?
Deerfield sits at 42.2°N, 87.8°W, 686 ft above sea level, in United States. The nearest listed city is Highland Park, 2.5 mi away.
Topography around Deerfield
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Deerfield.
Within 2 miles, the terrain around Deerfield has only modest variations in elevation — a maximum elevation change of 138 ft around an average of 676 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 269 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 892 ft.
The land around Deerfield is covered by trees (51%) and artificial surfaces (31%) within 2 miles, trees (36%), water (28%) and artificial surfaces (23%) within 10 miles, and water (40%) 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 Deerfield (42.1711°, -87.8445°, elevation 686 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. 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).