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Monthly
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Current
Hourly
7 Days
14 Days
Monthly
°C
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°Celsius
°Fahrenheit
Monthly Historical Averages
Mountainside, NJ
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Daily Historical Averages
January 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
7°
12
5°
13
7°
14
11°
15
7°
16
-1°
17
1°
18
3°
19
0°
20
-2°
21
-3°
22
-2°
23
0°
24
1°
25
0°
26
27
28
29
30
31
Forecast
Sunday, January 11, 2026
Day
7°
Feels 4
Wind
26 km/h W
Gust
52 km/h
Humidity
52%
P.O.P
30%
Night
-2°
Feels -8
Wind
30 km/h W
Gust
45 km/h
Humidity
59%
P.O.P
10%
Historical Averages
Jan 11
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
January
Average Temperature
High
3°
Feels 0
Low
-5°
Feels -9
Average Precipitation
8 Days
Rain amount
29.4mm
Snow amount
22.7cm