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This page provides the following climatological data collected
in Morris Plains, New Jersey for the period 1996-2010:
Climatological Summary for Morris Plains, New Jersey (1996-2010):
| Month |
Mean Temperature oF |
Mean Total Precipitation (inches) |
Mean Number of Precipitation Days |
Daily
Maximum |
Daily
Minimum |
| January |
37.5 |
20.9 |
3.76 |
10.6 |
| February |
40.7 |
22.2 |
3.04 |
8.0 |
| March |
51.3 |
30.1 |
4.11 |
10.5 |
| April |
63.8 |
40.0 |
4.42 |
11.2 |
| May |
73.9 |
48.7 |
4.06 |
11.7 |
| June |
82.4 |
58.9 |
5.40 |
11.5 |
| July |
86.4 |
62.6 |
4.72 |
10.1 |
| August |
85.1 |
62.8 |
4.36 |
9.7 |
| September |
77.4 |
54.6 |
5.08 |
8.6 |
| October |
64.5 |
43.0 |
5.73 |
8.9 |
| November |
54.3 |
35.1 |
3.80 |
9.8 |
| December |
41.1 |
25.1 |
4.96 |
10.3 |
| Average2 |
63.1 |
42.0 |
4.45 |
10.1 |
|
| Remarks: |
| * |
Mean
temperature is based on monthly averages for the period 1997-2010. |
| * |
Mean
number of precipitation days is based on monthly averages for the period
1997-2010. |
| * |
Mean
total precipitation is based on monthly averages for the period 1997-2010. |
| * |
Mean number of precipitation days = Mean number of days with at least 0.01 inches of precipitation. |
| * |
Precipitation includes both rain and snow. |
 |
| Month |
Monthly
Average (°F) |
Record
Maximum (°F) |
Year |
Record
Minimum (°F) |
Year |
| January |
29.6 |
71 |
2007 |
-3 |
2009 |
| February |
32.5 |
72 |
1997 |
3 |
2003 |
| March |
40.5 |
87 |
1998 |
3 |
2007 |
| April |
51.6 |
96 |
2002 |
20 |
2008 |
| May |
60.9 |
95 |
2001
2006
2010 |
27 |
2008 |
| June |
70.0 |
99 |
2008 |
39 |
2001 |
| July |
74.5 |
103 |
2010 |
47 |
2001 |
| August |
73.6 |
104 |
2001 |
48 |
1998 |
| September |
65.5 |
97 |
2010 |
33 |
1997 |
| October |
53.5 |
88 |
2007 |
24 |
1997 |
| November |
43.9 |
80 |
2003 |
14 |
1996 |
| December |
34.0 |
75 |
1998 |
2 |
2005 |
| Summary |
52.5 |
104 |
2001 |
-3 |
2009 |
| |
| Number of Days at or Above 90°F |
| 1997 |
28 |
| 1998 |
17 |
| 1999 |
39 |
| 2000 |
13 |
| 2001 |
27 |
| 2002 |
40 |
| 2003 |
17 |
| 2004 |
09 |
| 2005 |
36 |
| 2006 |
25 |
| 2007 |
30 |
| 2008 |
31 |
| 2009 |
16 |
| 2010 |
51 |
| Mean |
27 |
| |
| Number of Days Maximum at or Below 32°F |
| 1997 |
15 |
| 1998 |
08 |
| 1999 |
18 |
| 2000 |
31 |
| 2001 |
11 |
| 2002 |
05 |
| 2003 |
32 |
| 2004 |
31 |
| 2005 |
28 |
| 2006 |
11 |
| 2007 |
27 |
| 2008 |
19 |
| 2009 |
31 |
| 2010 |
23 |
| Mean |
21 |
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| Number of Days Minimum at or Below 32°F |
| 1997 |
114 |
| 1998 |
94 |
| 1999 |
120 |
| 2000 |
122 |
| 2001 |
107 |
| 2002 |
116 |
| 2003 |
116 |
| 2004 |
115 |
| 2005 |
136 |
| 2006 |
114 |
| 2007 |
124 |
| 2008 |
131 |
| 2009 |
118 |
| 2010 |
114 |
| Mean |
117 |
Top of Page
 |
| Month |
Monthly
Average (inHg) |
Record
Maximum (inHg) |
Year |
Record
Minimum (inHg) |
Year |
| January |
30.12 |
31.01 |
1999 |
29.17 |
2003 |
| February |
30.11 |
30.87 |
2001 |
29.05 |
2010 |
| March |
30.06 |
30.86 |
2007 |
29.07 |
1999 |
| April |
30.00 |
30.88 |
2002 |
28.71 |
2007 |
| May |
29.98 |
30.69 |
2001 |
29.32 |
2000 |
| June |
29.92 |
30.60 |
2002 |
29.21 |
1998 |
| July |
29.95 |
30.39 |
2002 |
29.32 |
1998 |
| August |
30.01 |
30.60 |
2002 |
29.48 |
2005 |
| September |
30.06 |
30.60 |
2002 |
29.06 |
1999 |
| October |
30.09 |
30.73 |
2008 |
29.06 |
2003 |
| November |
30.12 |
30.82 |
2004 |
29.11 |
2005 |
| December |
30.13 |
30.89 |
2000 |
29.07 |
2003 |
| Summary |
30.05 |
31.01 |
1999 |
28.71 |
2007 |
Top of Page
 |
| Month |
Average Monthly
Total (inches) |
Record 24-Hr
Maximum (inches) |
Year |
Record Monthly
Total (inches) |
Year |
| January |
3.72 |
2.66 |
1999 |
8.45 |
1998 |
| February |
3.11 |
2.98 |
2008 |
8.08 |
2008 |
| March |
4.58 |
3.02 |
2005 |
10.68 |
2010 |
| April |
4.31 |
4.76 |
2007 |
10.20 |
2007 |
| May |
4.06 |
1.49 |
2003 |
6.48 |
1998 |
| June |
5.24 |
3.64 |
1998 |
10.87 |
2006 |
| July |
4.67 |
4.32 |
2004 |
10.67 |
2004 |
| August |
4.32 |
3.17 |
2007 |
8.54 |
2007 |
| September |
4.98 |
9.08 |
1999 |
12.74 |
1999 |
| October |
5.69 |
8.33 |
2005 |
17.58 |
2005 |
| November |
3.74 |
3.10 |
2006 |
6.30 |
2006 |
| December |
4.94 |
2.27 |
2008 |
9.14 |
2009 |
| Summary |
4.45 |
9.08 |
1999 |
17.58 |
2005 |
| |
| Annual Total Rainfall (inches) |
| 1997 |
48.47 |
| 1998 |
43.48 |
| 1999 |
52.76 |
| 2000 |
47.43 |
| 2001 |
35.85 |
| 2002 |
48.94 |
| 2003 |
62.59 |
| 2004 |
53.36 |
| 2005 |
58.55 |
| 2006 |
62.70 |
| 2007 |
60.67 |
| 2008 |
58.67 |
| 2009 |
55.59 |
| 2010 |
52.00 |
| Mean |
53.00 |
Top of Page
 |
| Month |
Average Monthly
Total (inches) |
Record 24-Hr
Maximum (inches) |
Year |
Record Monthly
Total (inches) |
Year |
| January |
7.5 |
9.5 |
2005 |
17.2 |
2004 |
| February |
9.9 |
18.0 |
2003 |
31.9 |
2003 |
| March |
5.4 |
6.3 |
1999 |
13.5 |
2004 |
| April |
0.8 |
4.8 |
2003 |
4.8 |
2003 |
| May |
0.0 |
0.0 |
-- |
0.0 |
-- |
| June |
0.0 |
0.0 |
-- |
0.0 |
-- |
| July |
0.0 |
0.0 |
-- |
0.0 |
-- |
| August |
0.0 |
0.0 |
-- |
0.0 |
-- |
| September |
0.0 |
0.0 |
-- |
0.0 |
-- |
| October |
0.0 |
0.0 |
-- |
0.0 |
-- |
| November |
0.4 |
3.1 |
2007 |
3.1 |
2007 |
| December |
7.7 |
19.0 |
2000 |
21.6 |
2000 |
| Summary |
2.6 |
19.0 |
2000 |
31.9 |
2003 |
| |
| Seasonal Snowfall Totals (inches) |
| 1996 - 1997 |
23.3 |
| 1997 - 1998 |
17.6 |
| 1998 - 1999 |
12.1 |
| 1999 - 2000 |
22.8 |
| 2000 - 2001 |
52.5 |
| 2001 - 2002 |
5.2 |
| 2002 - 2003 |
61.8 |
| 2003 - 2004 |
46.6 |
| 2004
- 2005 |
38.3 |
| 2005
- 2006 |
34.9 |
| 2006
- 2007 |
18.3 |
| 2007
- 2008 |
24.4 |
| 2008
- 2009 |
31.5 |
| 2009
- 2010 |
48.4 |
| Mean |
31.3 |
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| Date of First 1" Snowfall |
| 1996 - 1997 |
January 9, 1997 |
| 1997 - 1998 |
December 10, 1997 |
| 1998 - 1999 |
January 8, 1999 |
| 1999 - 2000 |
January 20, 2000 |
| 2000 - 2001 |
December 30, 2000 |
| 2001 - 2002 |
January 6, 2002 |
| 2002 - 2003 |
November 27, 2002 |
| 2003 - 2004 |
December 5, 2003 |
| 2004 - 2005 |
December 27, 2004 |
| 2005
- 2006 |
December
4, 2005 |
| 2006
- 2007 |
February 2,
2007 |
| 2007
- 2008 |
December
2, 2007 |
| 2008
- 2009 |
December
16, 2008 |
| 2009
- 2010 |
December
5, 2009 |
| 2010
- 2011 |
December
26, 2010 |
| Mean |
December
23 |
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| Year |
First 32ºF |
Last 32ºF |
| 1996 |
October 04 |
No Data |
| 1997 |
October 02 |
May 8 |
| 1998 |
October 23 |
April 29 |
| 1999 |
October 08 |
April 06 |
| 2000 |
October 30 |
April 14 |
| 2001 |
October 09 |
April 27 |
| 2002 |
October 22 |
April 27 |
| 2003 |
October 03 |
April 14 |
| 2004 |
October 06 |
April 16 |
| 2005 |
October
27 |
April
17 |
| 2006 |
October
13 |
April
30 |
| 2007 |
October
29 |
April
14 |
| 2008 |
October
21 |
May
01 |
| 2009 |
October
14 |
May
19 |
| 2010 |
October
22 |
May
11 |
| Average Date |
October
15 |
April
25 |
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