Iselin weather in November
In November, Iselin sees average daytime highs of 53°F and overnight lows near 40°F, with 3.0 in of precipitation across 7.8 wet days and about 9.7 hours of daylight. It is the 8th-warmest and 12th-wettest month of the year here.
Highs ease over the month, from about 58°F in the first days to 49°F by the end. The sky is clear or mostly clear about 35% of the time in November, and the air most often feels dry.
Daylight stretches from about 10 h 12 min at the start of November to 9 h 18 min by month's end. Set against the rest of the year, November is Iselin's 3rd-clearest and 6th-windiest month. For the whole year in context, see Iselin's year-round climate.
- Daytime high
- 53°
- 8th warmest
- Overnight low
- 40°
- 5th coldest
- Precipitation
- 3.0 in
- 7.8 wet days
- Daylight
- 9 h 42 min
- 6:51 AM – 4:34 PM
- Cloud cover
- 57%
- 3rd clearest
- Wind
- 8 mph
- 6th windiest
- Solar energy
- 2.24 kWh/m²
- Travel score
- 3.3
- out of 10
Iselin is unincorporated community in New Jersey, United States.
- Density
- 2,262/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in November
Highs ease over the month, from about 58°F in the first days to 49°F by the end.
A typical November day in Iselin reaches about 53°F in the afternoon and slips back to 40°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 43°F and 64°F. Set against its neighbours, November runs about 11°F cooler than October and about 9°F warmer than December.
| 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) | 58 | 58 | 58 | 57 | 57 | 57 | 56 | 56 | 56 | 55 | 55 | 55 | 54 | 54 | 53 | 53 | 53 | 52 | 52 | 52 | 52 | 51 | 51 | 51 | 50 | 50 | 50 | 49 | 49 | 49 |
| Avg low (°F) | 45 | 44 | 44 | 44 | 43 | 43 | 43 | 42 | 42 | 42 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 38 | 38 | 37 | 37 | 37 | 37 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 58 | 45 |
| 2 | 58 | 44 |
| 3 | 58 | 44 |
| 4 | 57 | 44 |
| 5 | 57 | 43 |
| 6 | 57 | 43 |
| 7 | 56 | 43 |
| 8 | 56 | 42 |
| 9 | 56 | 42 |
| 10 | 55 | 42 |
| 11 | 55 | 41 |
| 12 | 55 | 41 |
| 13 | 54 | 41 |
| 14 | 54 | 40 |
| 15 | 53 | 40 |
| 16 | 53 | 40 |
| 17 | 53 | 40 |
| 18 | 52 | 39 |
| 19 | 52 | 39 |
| 20 | 52 | 39 |
| 21 | 52 | 39 |
| 22 | 51 | 38 |
| 23 | 51 | 38 |
| 24 | 51 | 38 |
| 25 | 50 | 38 |
| 26 | 50 | 38 |
| 27 | 50 | 37 |
| 28 | 49 | 37 |
| 29 | 49 | 37 |
| 30 | 49 | 37 |
How November really feels in Iselin
Once humidity and wind are folded in, November averages 0 days that feel above 90°F and 6 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
The story in November is cold — wind chill drags the overnight "feels like" below the raw low.
Iselin weather by month
How November compares with the rest of the year at a glance. November is the 8th-warmest and 12th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 39° / 27° | 3.2 | 9.2 | 3.9 | 9.4 | 0.0 |
| Feb | 42° / 28° | 3.0 | 8.5 | 3.4 | 10.4 | 0.3 |
| Mar | 49° / 35° | 4.2 | 10.4 | 2.8 | 11.7 | 2.0 |
| Apr | 61° / 46° | 3.6 | 10.6 | 0.3 | 13 | 4.8 |
| May | 70° / 55° | 3.4 | 11.1 | 0 | 14.2 | 6.3 |
| Jun | 79° / 65° | 4.0 | 11.1 | 0 | 14.8 | 6.3 |
| Jul | 84° / 71° | 4.1 | 11.3 | 0 | 14.6 | 5.2 |
| Aug | 82° / 69° | 4.1 | 10.6 | 0 | 13.6 | 6.0 |
| Sep | 76° / 62° | 3.7 | 9.2 | 0 | 12.3 | 7.0 |
| Oct | 65° / 51° | 3.7 | 8.5 | 0 | 10.9 | 6.0 |
| Nov | 53° / 40° | 3.0 | 7.8 | 0.3 | 9.7 | 3.3 |
| Dec | 44° / 32° | 3.9 | 9.5 | 2 | 9.2 | 0.8 |
Cloud cover in November
The sky is clear or mostly clear about 35% of the time in November.
Beyond those clear spells, partly cloudy skies cover about 16% of November, with mostly cloudy or overcast conditions the remaining 50%.
| 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 (%) | 50 | 51 | 51 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 51 | 50 | 50 | 50 | 50 | 49 | 50 | 49 | 50 | 49 | 49 | 50 | 49 | 50 | 49 | 49 | 49 | 48 | 48 |
| Cloudier (%) | 50 | 49 | 49 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 49 | 50 | 50 | 50 | 50 | 51 | 50 | 51 | 50 | 51 | 51 | 50 | 51 | 50 | 51 | 51 | 51 | 52 | 52 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 50 | 50 |
| 2 | 51 | 49 |
| 3 | 51 | 49 |
| 4 | 52 | 48 |
| 5 | 52 | 48 |
| 6 | 52 | 48 |
| 7 | 52 | 48 |
| 8 | 52 | 48 |
| 9 | 52 | 48 |
| 10 | 52 | 48 |
| 11 | 52 | 48 |
| 12 | 51 | 49 |
| 13 | 50 | 50 |
| 14 | 50 | 50 |
| 15 | 50 | 50 |
| 16 | 50 | 50 |
| 17 | 49 | 51 |
| 18 | 50 | 50 |
| 19 | 49 | 51 |
| 20 | 50 | 50 |
| 21 | 49 | 51 |
| 22 | 49 | 51 |
| 23 | 50 | 50 |
| 24 | 49 | 51 |
| 25 | 50 | 50 |
| 26 | 49 | 51 |
| 27 | 49 | 51 |
| 28 | 49 | 51 |
| 29 | 48 | 52 |
| 30 | 48 | 52 |
Chance of precipitation in November
Iselin gets around 3.0 in of rain and snow over 7.8 wet days in November, the driest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 27% and peaks near 30% on the wettest days, and about 0 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 (%) | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 30 |
| Snow chance (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 4 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 24 | 1 |
| 2 | 24 | 1 |
| 3 | 24 | 1 |
| 4 | 24 | 1 |
| 5 | 24 | 1 |
| 6 | 24 | 1 |
| 7 | 25 | 1 |
| 8 | 25 | 1 |
| 9 | 25 | 1 |
| 10 | 26 | 1 |
| 11 | 26 | 1 |
| 12 | 26 | 1 |
| 13 | 27 | 1 |
| 14 | 27 | 1 |
| 15 | 27 | 1 |
| 16 | 28 | 1 |
| 17 | 28 | 1 |
| 18 | 28 | 1 |
| 19 | 28 | 1 |
| 20 | 28 | 1 |
| 21 | 28 | 1 |
| 22 | 28 | 1 |
| 23 | 28 | 1 |
| 24 | 28 | 1 |
| 25 | 28 | 2 |
| 26 | 28 | 2 |
| 27 | 28 | 2 |
| 28 | 29 | 3 |
| 29 | 29 | 3 |
| 30 | 30 | 4 |
Humidity in November
Most of November feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, November lands in the dry band about 96% 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 | 91 | 91 | 92 | 92 | 93 | 94 | 94 | 94 | 95 | 95 | 96 | 96 | 96 | 96 | 96 | 97 | 97 | 97 | 97 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 99 |
| Comfortable (%) | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 |
| Humid (%) | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 91 | 7 | 2 |
| 2 | 91 | 7 | 2 |
| 3 | 91 | 7 | 2 |
| 4 | 92 | 6 | 2 |
| 5 | 92 | 6 | 2 |
| 6 | 93 | 6 | 1 |
| 7 | 94 | 5 | 1 |
| 8 | 94 | 5 | 1 |
| 9 | 94 | 5 | 1 |
| 10 | 95 | 4 | 1 |
| 11 | 95 | 4 | 1 |
| 12 | 96 | 3 | 1 |
| 13 | 96 | 3 | 1 |
| 14 | 96 | 3 | 1 |
| 15 | 96 | 3 | 1 |
| 16 | 96 | 3 | 1 |
| 17 | 97 | 3 | 0 |
| 18 | 97 | 3 | 0 |
| 19 | 97 | 3 | 0 |
| 20 | 97 | 3 | 0 |
| 21 | 98 | 2 | 0 |
| 22 | 98 | 2 | 0 |
| 23 | 98 | 2 | 0 |
| 24 | 98 | 2 | 0 |
| 25 | 98 | 2 | 0 |
| 26 | 98 | 2 | 0 |
| 27 | 98 | 2 | 0 |
| 28 | 98 | 2 | 0 |
| 29 | 98 | 2 | 0 |
| 30 | 99 | 1 | 0 |
Wind in November
Winds average 8 mph in November.
Across November, daily wind ranges from about 8 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) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 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 | 8 | light breeze |
| 6 | 8 | light breeze |
| 7 | 8 | light breeze |
| 8 | 8 | light breeze |
| 9 | 8 | light breeze |
| 10 | 8 | light breeze |
| 11 | 8 | light breeze |
| 12 | 8 | light breeze |
| 13 | 8 | light breeze |
| 14 | 8 | light breeze |
| 15 | 8 | light breeze |
| 16 | 8 | light breeze |
| 17 | 8 | light breeze |
| 18 | 8 | 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 November
Daylight runs from about 10 h 12 min at the start of November to 9 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 54 minutes over November. Sunrise moves from 6:34 AM to 7:07 AM, and sunset from 4:48 PM to 4:27 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) | 10.2 | 10.2 | 10.2 | 10.1 | 10.1 | 10.0 | 10.0 | 10.0 | 9.9 | 9.9 | 9.9 | 9.8 | 9.8 | 9.8 | 9.7 | 9.7 | 9.7 | 9.6 | 9.6 | 9.6 | 9.6 | 9.5 | 9.5 | 9.5 | 9.4 | 9.4 | 9.4 | 9.4 | 9.4 | 9.3 |
| Sunrise (AM) | 6:34 | 6:35 | 6:36 | 6:37 | 6:39 | 6:40 | 6:41 | 6:42 | 6:43 | 6:44 | 6:46 | 6:47 | 6:48 | 6:49 | 6:50 | 6:51 | 6:53 | 6:54 | 6:55 | 6:56 | 6:57 | 6:58 | 6:59 | 7:00 | 7:02 | 7:03 | 7:04 | 7:05 | 7:06 | 7:07 |
| Sunset (PM) | 4:48 | 4:47 | 4:46 | 4:45 | 4:43 | 4:42 | 4:41 | 4:40 | 4:39 | 4:39 | 4:38 | 4:37 | 4:36 | 4:35 | 4:34 | 4:34 | 4:33 | 4:32 | 4:32 | 4:31 | 4:30 | 4:30 | 4:29 | 4:29 | 4:28 | 4:28 | 4:28 | 4:27 | 4:27 | 4:27 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.2 | 6:34 | 4:48 |
| 2 | 10.2 | 6:35 | 4:47 |
| 3 | 10.2 | 6:36 | 4:46 |
| 4 | 10.1 | 6:37 | 4:45 |
| 5 | 10.1 | 6:39 | 4:43 |
| 6 | 10.0 | 6:40 | 4:42 |
| 7 | 10.0 | 6:41 | 4:41 |
| 8 | 10.0 | 6:42 | 4:40 |
| 9 | 9.9 | 6:43 | 4:39 |
| 10 | 9.9 | 6:44 | 4:39 |
| 11 | 9.9 | 6:46 | 4:38 |
| 12 | 9.8 | 6:47 | 4:37 |
| 13 | 9.8 | 6:48 | 4:36 |
| 14 | 9.8 | 6:49 | 4:35 |
| 15 | 9.7 | 6:50 | 4:34 |
| 16 | 9.7 | 6:51 | 4:34 |
| 17 | 9.7 | 6:53 | 4:33 |
| 18 | 9.6 | 6:54 | 4:32 |
| 19 | 9.6 | 6:55 | 4:32 |
| 20 | 9.6 | 6:56 | 4:31 |
| 21 | 9.6 | 6:57 | 4:30 |
| 22 | 9.5 | 6:58 | 4:30 |
| 23 | 9.5 | 6:59 | 4:29 |
| 24 | 9.5 | 7:00 | 4:29 |
| 25 | 9.4 | 7:02 | 4:28 |
| 26 | 9.4 | 7:03 | 4:28 |
| 27 | 9.4 | 7:04 | 4:28 |
| 28 | 9.4 | 7:05 | 4:27 |
| 29 | 9.4 | 7:06 | 4:27 |
| 30 | 9.3 | 7:07 | 4:27 |
Solar energy in November
Average shortwave solar energy reaching the ground each day in November, about 2.24 kWh/m².
For context, solar energy here swings from a low near 1.77 kWh/m² to a high of 5.95 kWh/m² in June across the year — November's 2.24 kWh/m² sits near the bottom.
| 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) | 2.6 | 2.6 | 2.6 | 2.5 | 2.5 | 2.5 | 2.5 | 2.4 | 2.4 | 2.4 | 2.4 | 2.3 | 2.3 | 2.3 | 2.2 | 2.2 | 2.2 | 2.2 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.0 | 2.0 | 2.0 | 2.0 | 1.9 | 1.9 | 1.9 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Dim | Dim | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 2.6 | Moderate |
| 2 | 2.6 | Moderate |
| 3 | 2.6 | Moderate |
| 4 | 2.5 | Moderate |
| 5 | 2.5 | Moderate |
| 6 | 2.5 | Moderate |
| 7 | 2.5 | Moderate |
| 8 | 2.4 | Moderate |
| 9 | 2.4 | Moderate |
| 10 | 2.4 | Moderate |
| 11 | 2.4 | Moderate |
| 12 | 2.3 | Moderate |
| 13 | 2.3 | Moderate |
| 14 | 2.3 | Moderate |
| 15 | 2.2 | Moderate |
| 16 | 2.2 | Moderate |
| 17 | 2.2 | Moderate |
| 18 | 2.2 | Moderate |
| 19 | 2.1 | Moderate |
| 20 | 2.1 | Moderate |
| 21 | 2.1 | Moderate |
| 22 | 2.1 | Moderate |
| 23 | 2.1 | Moderate |
| 24 | 2.0 | Moderate |
| 25 | 2.0 | Moderate |
| 26 | 2.0 | Dim |
| 27 | 2.0 | Dim |
| 28 | 1.9 | Dim |
| 29 | 1.9 | Dim |
| 30 | 1.9 | Dim |
Hazard calendar for Iselin
In November, Iselin sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
Iselin sits in the Atlantic hurricane belt; the season peaks August–October.
Is November a good time to visit Iselin?
Our two travel scores rate November for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
November is a weaker month for outdoor sightseeing in Iselin.
What to pack for Iselin in November
From November's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In November, Iselin sees daytime highs around 53°F and nights near 40°F. Pack a warm layer. About 8 days see rain.
Sea temperature near Iselin in November
The nearest coast averages about 55°F in November — 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 74°F and coldest in February near 40°F.
It's comfortable for a long swim from Jun 30 to Sep 26 — about 2.9 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 43 | 40 | 41 | 46 | 55 | 65 | 72 | 74 | 71 | 63 | 55 | 48 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 43 | Bracing |
| Feb | 40 | Bracing |
| Mar | 41 | Bracing |
| Apr | 46 | Bracing |
| May | 55 | Bracing |
| Jun | 65 | Cool |
| Jul | 72 | Refreshing |
| Aug | 74 | Refreshing |
| Sep | 71 | Refreshing |
| Oct | 63 | Cool |
| Nov | 55 | Bracing |
| Dec | 48 | Bracing |
UV index in Iselin in November
Clear-sky midday UV in November peaks around 3. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Iselin peaks around July 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 | 3 | 5 | 6 | 7 | 8 | 8 | 6 | 6 | 3 | 3 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 3 | Moderate |
| Dec | 1 | Low |
Air quality in Iselin in November
Average fine-particle pollution (PM2.5) through the year — so you can see where November falls, not just the annual average.
Air quality in Iselin is worst in July — around 18 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (November, 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 | 16 | 16 | 17 | 17 | 18 | 16 | 14 | 11 | 10 | 12 |
| 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 | 16 | Moderate |
| May | 17 | Moderate |
| Jun | 17 | Moderate |
| Jul | 18 | Moderate |
| Aug | 16 | Moderate |
| Sep | 14 | Moderate |
| Oct | 11 | Good |
| Nov | 10 | Good |
| Dec | 12 | Good |
Where is Iselin?
Iselin sits at 40.6°N, 74.3°W, 62 ft above sea level, in United States. The nearest listed city is Colonia, 1.2 mi away.
Topography around Iselin
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Iselin.
Within 2 miles, the terrain around Iselin has only modest variations in elevation — a maximum elevation change of 200 ft around an average of 102 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 630 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,847 ft.
The land around Iselin is covered by trees (49%) and artificial surfaces (39%) within 2 miles, trees (46%) and artificial surfaces (33%) within 10 miles, and trees (56%) and water (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 Iselin (40.5754°, -74.3224°, elevation 62 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).