Crystal Lake weather in June
In June, Crystal Lake sees average daytime highs of 78°F and overnight lows near 61°F, with 3.8 in of rain across 11.8 wet days and about 15 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.
Highs climb over the month, from about 74°F in the first days to 81°F by the end. The sky is clear or mostly clear about 31% of the time in June, and the air most often feels dry.
Daylight stretches from about 14 h 48 min at the start of June to 15 h 06 min by month's end. Set against the rest of the year, June is Crystal Lake's 5th-clearest and 10th-windiest month. For the whole year in context, see Crystal Lake's year-round climate.
- Daytime high
- 78°
- 3rd warmest
- Overnight low
- 61°
- 10th coldest
- Rainfall
- 3.8 in
- 11.8 wet days
- Daylight
- 15 h 06 min
- 4:21 AM – 7:26 PM
- Cloud cover
- 59%
- 5th clearest
- Wind
- 7 mph
- 10th windiest
- Solar energy
- 6.32 kWh/m²
- Travel score
- 6.4
- out of 10
Crystal Lake is city in McHenry County, Illinois, USA.
- Density
- 780/km²
- people per km²
- Founded
- 1914
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in June
Highs climb over the month, from about 74°F in the first days to 81°F by the end.
A typical June day in Crystal Lake reaches about 78°F in the afternoon and slips back to 61°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 67°F and 88°F. Set against its neighbours, June runs about 10°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) | 73 | 74 | 74 | 74 | 75 | 75 | 75 | 76 | 76 | 76 | 77 | 77 | 77 | 78 | 78 | 78 | 79 | 79 | 79 | 79 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 81 | 81 | 81 |
| Avg low (°F) | 56 | 56 | 56 | 57 | 57 | 58 | 58 | 58 | 59 | 59 | 60 | 60 | 60 | 61 | 61 | 61 | 62 | 62 | 62 | 62 | 63 | 63 | 63 | 63 | 63 | 64 | 64 | 64 | 64 | 64 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 73 | 56 |
| 2 | 74 | 56 |
| 3 | 74 | 56 |
| 4 | 74 | 57 |
| 5 | 75 | 57 |
| 6 | 75 | 58 |
| 7 | 75 | 58 |
| 8 | 76 | 58 |
| 9 | 76 | 59 |
| 10 | 76 | 59 |
| 11 | 77 | 60 |
| 12 | 77 | 60 |
| 13 | 77 | 60 |
| 14 | 78 | 61 |
| 15 | 78 | 61 |
| 16 | 78 | 61 |
| 17 | 79 | 62 |
| 18 | 79 | 62 |
| 19 | 79 | 62 |
| 20 | 79 | 62 |
| 21 | 80 | 63 |
| 22 | 80 | 63 |
| 23 | 80 | 63 |
| 24 | 80 | 63 |
| 25 | 80 | 63 |
| 26 | 80 | 64 |
| 27 | 80 | 64 |
| 28 | 81 | 64 |
| 29 | 81 | 64 |
| 30 | 81 | 64 |
How June really feels in Crystal Lake
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.
Crystal Lake 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 | 30° / 17° | 2.0 | 7.9 | 6 | 9.3 | 0.0 |
| Feb | 34° / 20° | 1.9 | 7 | 5.2 | 10.3 | 0.0 |
| Mar | 45° / 29° | 2.5 | 9.7 | 3.3 | 11.6 | 1.1 |
| Apr | 57° / 39° | 4.3 | 12.3 | 1.1 | 13.1 | 3.7 |
| May | 68° / 50° | 4.3 | 12.2 | 0 | 14.4 | 5.9 |
| Jun | 78° / 61° | 3.8 | 11.8 | 0 | 15 | 6.4 |
| Jul | 82° / 65° | 3.4 | 10.4 | 0 | 14.8 | 6.4 |
| Aug | 80° / 63° | 3.6 | 10.6 | 0 | 13.7 | 6.6 |
| Sep | 73° / 55° | 3.0 | 8.8 | 0 | 12.3 | 7.0 |
| Oct | 60° / 44° | 3.0 | 8.7 | 0.2 | 10.8 | 5.0 |
| Nov | 46° / 33° | 2.4 | 7.8 | 1.6 | 9.6 | 1.4 |
| Dec | 35° / 22° | 2.1 | 8 | 4.6 | 9 | 0.0 |
Cloud cover in June
The sky is clear or mostly clear about 31% of the time in June.
Beyond those clear spells, partly cloudy skies cover about 17% of June, with mostly cloudy or overcast conditions the remaining 52%.
| 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 (%) | 44 | 45 | 45 | 45 | 44 | 45 | 45 | 45 | 46 | 45 | 45 | 45 | 46 | 46 | 45 | 45 | 46 | 47 | 48 | 48 | 50 | 50 | 52 | 52 | 53 | 53 | 53 | 54 | 54 | 54 |
| Cloudier (%) | 56 | 55 | 55 | 55 | 56 | 55 | 55 | 55 | 54 | 55 | 55 | 55 | 54 | 54 | 55 | 55 | 54 | 53 | 52 | 52 | 50 | 50 | 48 | 48 | 47 | 47 | 47 | 46 | 46 | 46 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 44 | 56 |
| 2 | 45 | 55 |
| 3 | 45 | 55 |
| 4 | 45 | 55 |
| 5 | 44 | 56 |
| 6 | 45 | 55 |
| 7 | 45 | 55 |
| 8 | 45 | 55 |
| 9 | 46 | 54 |
| 10 | 45 | 55 |
| 11 | 45 | 55 |
| 12 | 45 | 55 |
| 13 | 46 | 54 |
| 14 | 46 | 54 |
| 15 | 45 | 55 |
| 16 | 45 | 55 |
| 17 | 46 | 54 |
| 18 | 47 | 53 |
| 19 | 48 | 52 |
| 20 | 48 | 52 |
| 21 | 50 | 50 |
| 22 | 50 | 50 |
| 23 | 52 | 48 |
| 24 | 52 | 48 |
| 25 | 53 | 47 |
| 26 | 53 | 47 |
| 27 | 53 | 47 |
| 28 | 54 | 46 |
| 29 | 54 | 46 |
| 30 | 54 | 46 |
Chance of precipitation in June
Crystal Lake gets around 3.8 in of rain over 11.8 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 39% and peaks near 41% 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 (%) | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 40 | 39 | 39 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 38 | 38 | 38 | 37 | 37 | 36 | 36 | 35 |
| Rain chance (%) | |
|---|---|
| 1 | 41 |
| 2 | 41 |
| 3 | 41 |
| 4 | 40 |
| 5 | 40 |
| 6 | 40 |
| 7 | 40 |
| 8 | 40 |
| 9 | 40 |
| 10 | 39 |
| 11 | 39 |
| 12 | 40 |
| 13 | 40 |
| 14 | 40 |
| 15 | 40 |
| 16 | 40 |
| 17 | 40 |
| 18 | 40 |
| 19 | 40 |
| 20 | 39 |
| 21 | 39 |
| 22 | 39 |
| 23 | 38 |
| 24 | 38 |
| 25 | 38 |
| 26 | 37 |
| 27 | 37 |
| 28 | 36 |
| 29 | 36 |
| 30 | 35 |
Humidity in June
Most of June feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, June lands in the dry band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 22% 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 (%) | 59 | 58 | 55 | 53 | 51 | 51 | 48 | 47 | 45 | 43 | 40 | 38 | 36 | 34 | 32 | 30 | 28 | 27 | 26 | 25 | 24 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 21 | 21 |
| Comfortable (%) | 17 | 18 | 19 | 20 | 21 | 21 | 22 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 |
| Humid (%) | 15 | 15 | 16 | 16 | 16 | 16 | 17 | 17 | 18 | 18 | 19 | 19 | 20 | 21 | 21 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 |
| Muggy (%) | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 13 | 13 | 14 | 15 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 |
| Oppressive (%) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 6 | 7 | 7 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 59 | 17 | 15 | 9 | 0 |
| 2 | 58 | 18 | 15 | 9 | 0 |
| 3 | 55 | 19 | 16 | 10 | 0 |
| 4 | 53 | 20 | 16 | 10 | 1 |
| 5 | 51 | 21 | 16 | 11 | 1 |
| 6 | 51 | 21 | 16 | 11 | 1 |
| 7 | 48 | 22 | 17 | 12 | 1 |
| 8 | 47 | 23 | 17 | 13 | 1 |
| 9 | 45 | 23 | 18 | 13 | 1 |
| 10 | 43 | 24 | 18 | 14 | 1 |
| 11 | 40 | 24 | 19 | 15 | 1 |
| 12 | 38 | 24 | 19 | 17 | 2 |
| 13 | 36 | 25 | 20 | 18 | 2 |
| 14 | 34 | 25 | 21 | 19 | 2 |
| 15 | 32 | 25 | 21 | 20 | 2 |
| 16 | 30 | 25 | 22 | 21 | 2 |
| 17 | 28 | 25 | 22 | 22 | 2 |
| 18 | 27 | 25 | 23 | 23 | 2 |
| 19 | 26 | 25 | 23 | 24 | 3 |
| 20 | 25 | 24 | 23 | 25 | 3 |
| 21 | 24 | 24 | 23 | 25 | 3 |
| 22 | 23 | 24 | 23 | 26 | 3 |
| 23 | 23 | 23 | 23 | 27 | 4 |
| 24 | 22 | 23 | 23 | 27 | 4 |
| 25 | 22 | 23 | 23 | 27 | 4 |
| 26 | 22 | 22 | 23 | 28 | 5 |
| 27 | 21 | 22 | 23 | 28 | 5 |
| 28 | 21 | 22 | 22 | 28 | 6 |
| 29 | 21 | 22 | 22 | 28 | 7 |
| 30 | 21 | 22 | 22 | 28 | 7 |
Wind in June
Winds average 7 mph in June.
Across June, daily wind ranges from about 7 mph on the calmest days to 7 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 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Feels | light breeze | 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 | 7 | light breeze |
| 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 | 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 |
Sunrise & sunset in June
Daylight runs from about 14 h 48 min at the start of June to 15 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 18 minutes over June. Sunrise moves from 4:25 AM to 4:25 AM, and sunset from 7:16 PM to 7:28 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) | 14.8 | 14.9 | 14.9 | 14.9 | 14.9 | 14.9 | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 |
| Sunrise (AM) | 4:25 | 4:25 | 4:24 | 4:24 | 4:24 | 4:23 | 4:23 | 4:23 | 4:22 | 4:22 | 4:22 | 4:22 | 4:22 | 4:22 | 4:21 | 4:21 | 4:21 | 4:22 | 4:22 | 4:22 | 4:22 | 4:22 | 4:22 | 4:22 | 4:23 | 4:23 | 4:23 | 4:24 | 4:24 | 4:25 |
| Sunset (PM) | 7:16 | 7:17 | 7:18 | 7:19 | 7:19 | 7:20 | 7:21 | 7:21 | 7:22 | 7:23 | 7:23 | 7:24 | 7:24 | 7:25 | 7:25 | 7:26 | 7:26 | 7:26 | 7:27 | 7:27 | 7:27 | 7:28 | 7:28 | 7:28 | 7:28 | 7:28 | 7:28 | 7:28 | 7:28 | 7:28 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.8 | 4:25 | 7:16 |
| 2 | 14.9 | 4:25 | 7:17 |
| 3 | 14.9 | 4:24 | 7:18 |
| 4 | 14.9 | 4:24 | 7:19 |
| 5 | 14.9 | 4:24 | 7:19 |
| 6 | 14.9 | 4:23 | 7:20 |
| 7 | 15.0 | 4:23 | 7:21 |
| 8 | 15.0 | 4:23 | 7:21 |
| 9 | 15.0 | 4:22 | 7:22 |
| 10 | 15.0 | 4:22 | 7:23 |
| 11 | 15.0 | 4:22 | 7:23 |
| 12 | 15.0 | 4:22 | 7:24 |
| 13 | 15.0 | 4:22 | 7:24 |
| 14 | 15.1 | 4:22 | 7:25 |
| 15 | 15.1 | 4:21 | 7:25 |
| 16 | 15.1 | 4:21 | 7:26 |
| 17 | 15.1 | 4:21 | 7:26 |
| 18 | 15.1 | 4:22 | 7:26 |
| 19 | 15.1 | 4:22 | 7:27 |
| 20 | 15.1 | 4:22 | 7:27 |
| 21 | 15.1 | 4:22 | 7:27 |
| 22 | 15.1 | 4:22 | 7:28 |
| 23 | 15.1 | 4:22 | 7:28 |
| 24 | 15.1 | 4:22 | 7:28 |
| 25 | 15.1 | 4:23 | 7:28 |
| 26 | 15.1 | 4:23 | 7:28 |
| 27 | 15.1 | 4:23 | 7:28 |
| 28 | 15.1 | 4:24 | 7:28 |
| 29 | 15.1 | 4:24 | 7:28 |
| 30 | 15.1 | 4:25 | 7:28 |
Solar energy in June
Average shortwave solar energy reaching the ground each day in June, about 6.32 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 1.6 kWh/m² to a high of 6.32 kWh/m² in June across the year — June's 6.32 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 | 6.1 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 |
| 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 | 6.1 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.2 | Intense |
| 8 | 6.2 | Intense |
| 9 | 6.2 | Intense |
| 10 | 6.2 | Intense |
| 11 | 6.2 | Intense |
| 12 | 6.2 | Intense |
| 13 | 6.3 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.3 | Intense |
| 16 | 6.3 | Intense |
| 17 | 6.3 | Intense |
| 18 | 6.3 | Intense |
| 19 | 6.3 | Intense |
| 20 | 6.4 | Intense |
| 21 | 6.4 | Intense |
| 22 | 6.4 | Intense |
| 23 | 6.4 | Intense |
| 24 | 6.4 | Intense |
| 25 | 6.4 | Intense |
| 26 | 6.4 | Intense |
| 27 | 6.4 | Intense |
| 28 | 6.4 | Intense |
| 29 | 6.4 | Intense |
| 30 | 6.4 | Intense |
Is June a good time to visit Crystal Lake?
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 Crystal Lake for sightseeing.
What to pack for Crystal Lake in June
From June's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In June, Crystal Lake sees daytime highs around 78°F and nights near 61°F. Pack sun protection. Worth having: light clothes and rain gear. About 12 days see rain.
Sea temperature near Crystal Lake in June
The nearest coast averages about 55°F in June — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 24 mi away) is warmest in August at about 71°F and coldest in March near 36°F.
It's comfortable for a long swim from Jul 18 to Sep 8 — about 1.7 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 | 38 | 43 | 55 | 68 | 71 | 67 | 57 | 47 | 42 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Refreshing | Refreshing | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 38 | Bracing |
| Feb | 36 | Bracing |
| Mar | 36 | Bracing |
| Apr | 38 | Bracing |
| May | 43 | Bracing |
| Jun | 55 | Bracing |
| Jul | 68 | Refreshing |
| Aug | 71 | Refreshing |
| Sep | 67 | Cool |
| Oct | 57 | Bracing |
| Nov | 47 | Bracing |
| Dec | 42 | Bracing |
UV index in Crystal Lake 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 Crystal Lake peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 Crystal Lake 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 Crystal Lake 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 Crystal Lake?
Crystal Lake sits at 42.2°N, 88.3°W, 915 ft above sea level, in United States. The nearest listed city is Lake in the Hills, 4.3 mi away.
Topography around Crystal Lake
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Crystal Lake.
Within 2 miles, the terrain around Crystal Lake has only modest variations in elevation — a maximum elevation change of 171 ft around an average of 906 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 322 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 787 ft.
The land around Crystal Lake is covered by trees (47%) and artificial surfaces (27%) within 2 miles, trees (39%) and grassland (26%) within 10 miles, and cropland (38%) and trees (21%) 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 Crystal Lake (42.2411°, -88.3162°, elevation 915 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).