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South Plainfield, United States Snapshot 2026
Where is South Plainfield?
South Plainfield, United States
- Continent
- Americas
- Country
- United States
- City
- South Plainfield
- Population
- 24.3K
- Elevation
- 18 m
- Coordinates
- 40.58°, -74.41°
South Plainfield is a city in United States with a population of approximately 24.3K. Average temperatures range from -2°C (28°F) in January to 30°C (86°F) in July. The best time to visit is May, June, August, September, October.
Time in South Plainfield right now
Open full time & time zone page 18:39 39
Tuesday, June 16, 2026
IANA time zone
America/New_York
Daylight saving
DST in effect
EST / EDT
Next DST change
November 1
backward -1h
Live weather in South Plainfield
Daylight in South Plainfield today
View full sunrise & sunset page Sunrise
Sunset
Day length
15h 04m
Climate normals for South Plainfield
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Fair May best
Excellent June best
Excellent July
Fair August best
Excellent September best
Excellent October best
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / -2°C | 1°C / -7°C | 9days (85 mm) Wet | 6h Fair | 67% Muggy | 2.4 Moderate | Poor | View Details |
| February | 7°C / -1°C | 3°C / -5°C | 9days (91 mm) Wet | 6.7h Fair | 68% Muggy | 3.4 Moderate | Poor | View Details |
| March | 11°C / 2°C | 8°C / -2°C | 10days (103 mm) Wet | 8h Good | 65% Muggy | 4.7 Moderate | Poor | View Details |
| April | 17°C / 7°C | 15°C / 4°C | 11days (104 mm) Wet | 8.7h Good | 66% Muggy | 5.3 High | Fair | View Details |
| May best | 22°C / 12°C | 22°C / 11°C | 13days (112 mm) Wet | 9.2h Good | 72% Muggy | 6.2 High | Excellent | View Details |
| June best | 27°C / 18°C | 28°C / 18°C | 11days (88 mm) Wet | 11.1h Excellent | 70% Muggy | 6.9 High | Excellent | View Details |
| July | 30°C / 22°C | 33°C / 24°C | 14days (130 mm) Wet | 11.5h Excellent | 72% Muggy | 7.2 Very High | Fair | View Details |
| August best | 29°C / 20°C | 31°C / 22°C | 11days (102 mm) Wet | 10.3h Excellent | 73% Muggy | 6.6 High | Excellent | View Details |
| September best | 25°C / 17°C | 26°C / 17°C | 9days (91 mm) Wet | 8.5h Good | 73% Muggy | 5 Moderate | Excellent | View Details |
| October best | 19°C / 11°C | 18°C / 10°C | 8days (99 mm) Wet | 7.3h Good | 73% Muggy | 4.2 Moderate | Good | View Details |
| November | 12°C / 5°C | 9°C / 1°C | 8days (75 mm) Wet | 7h Good | 69% Muggy | 2.9 Moderate | Fair | View Details |
| December | 7°C / 0°C | 3°C / -4°C | 10days (102 mm) Wet | 5.7h Fair | 71% Muggy | 2 Low | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 5°C / -2°C . Feb: 7°C / -1°C . Mar: 11°C / 2°C . Apr: 17°C / 7°C . May: 22°C / 12°C . Jun: 27°C / 18°C . Jul: 30°C / 22°C . Aug: 29°C / 20°C . Sep: 25°C / 17°C . Oct: 19°C / 11°C . Nov: 12°C / 5°C . Dec: 7°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 85 mm. Feb: 91 mm. Mar: 103 mm. Apr: 104 mm. May: 112 mm. Jun: 88 mm. Jul: 130 mm. Aug: 102 mm. Sep: 91 mm. Oct: 99 mm. Nov: 75 mm. Dec: 102 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 67%. Feb: 68%. Mar: 65%. Apr: 66%. May: 72%. Jun: 70%. Jul: 72%. Aug: 73%. Sep: 73%. Oct: 73%. Nov: 69%. Dec: 71%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 18 km/h . Mar: 19 km/h . Apr: 18 km/h . May: 16 km/h . Jun: 15 km/h . Jul: 13 km/h . Aug: 13 km/h . Sep: 14 km/h . Oct: 16 km/h . Nov: 17 km/h . Dec: 17 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 5. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 5. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
South Plainfield has a population of approximately 24.3K.
The best months to visit South Plainfield are May, June, August, September, October, when temperatures are pleasant and rainfall is lower.
South Plainfield receives approximately 1182mm of rainfall annually across 123 rainy days.
South Plainfield is located in United States, in the Americas region.
South Plainfield sits at an elevation of 18 m (59 ft) above sea level.