| Portsmouth Rhode Island
Weather Almanac |
|
|
|
|
|
|
|
|
|
| Thursday, December 20, 2018 |
|
|
|
|
|
|
|
|
|
| Clear early, Partly Cloudy Day to Cloudy PM, Light Winds and
Much Warmer |
|
|
|
|
|
|
|
|
|
| Climate
Normal Period |
|
Climate Record Period |
|
|
|
|
|
|
|
|
|
|
| 1981- 2010 |
|
1893 - 2018 |
|
|
|
|
|
|
|
|
|
|
| |
|
December 20, 2018 |
|
|
Record |
Record |
|
|
|
|
|
|
|
|
|
| Observed Daily Data |
|
Observed |
|
2017 |
|
Normal |
|
Depart |
|
Highest |
Lowest |
|
|
|
|
|
|
|
|
|
| Maximum Temperature |
|
49 |
|
49 |
|
40 |
|
+9 |
|
58 |
|
in |
1957 |
|
11 |
|
in |
1942 |
|
|
|
|
|
|
|
|
|
|
| Minimum
Temperature |
|
34 |
|
32 |
|
27 |
|
+7 |
|
51 |
|
in |
1957 |
|
-6 |
|
in |
1942 |
|
|
|
|
|
|
|
|
|
|
| Average Temperature |
|
42 |
|
41 |
|
33 |
|
+9 |
|
55 |
|
in |
1957 |
|
3 |
|
in |
1942 |
|
|
|
|
|
|
|
|
|
|
| Precipitation |
|
.00 |
|
T |
|
.14 |
|
-.14 |
|
1.48 |
|
in |
2002 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| One Hour |
|
.00 |
|
T |
|
|
|
|
|
.49 |
|
in |
2002 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Snow |
|
0.0 |
|
0.0 |
|
0.3 |
|
-0.3 |
|
16.0 |
|
in |
2009 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Snow
Depth |
|
0 |
|
0 |
|
|
|
|
|
14 |
|
in |
1904 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| HDD |
|
23 |
|
24 |
|
31 |
|
-8 |
|
62 |
|
in |
1942 |
|
10 |
|
in |
1957 |
|
|
|
|
|
|
|
|
|
|
| CDD |
|
0 |
|
0 |
|
0 |
|
+0 |
|
0 |
|
in |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum Dew Point |
|
45 |
|
40 |
|
33 |
|
+12 |
|
56 |
|
in |
2002 |
|
-1 |
|
in |
1983 |
|
|
|
|
|
|
|
|
|
|
| Minimum
Dew Point |
|
27 |
|
20 |
|
17 |
|
+10 |
|
45 |
|
in |
1957 |
|
-17 |
|
in |
1955 |
|
|
|
|
|
|
|
|
|
|
| Average Dew Point |
|
36 |
|
30 |
|
25 |
|
+11 |
|
49 |
|
in |
1957 |
|
-8 |
|
in |
1955 |
|
|
|
|
|
|
|
|
|
|
| Maximum Humidity |
|
88% |
|
75% |
|
84% |
|
+4% |
|
100% |
|
in |
2002 |
|
44% |
|
in |
1955 |
|
|
|
|
|
|
|
|
|
|
| Minimum
Humidity |
|
68% |
|
45% |
|
56% |
|
+12% |
|
90% |
|
in |
1987 |
|
22% |
|
in |
1962 |
|
|
|
|
|
|
|
|
|
|
| Average Humidity |
|
78% |
|
60% |
|
70% |
|
+8% |
|
95% |
|
in |
1987 |
|
35% |
|
in |
1955 |
|
|
|
|
|
|
|
|
|
|
| Maximum Barometer |
|
30.18 |
|
30.00 |
|
30.18 |
|
+00.00 |
|
30.97 |
|
in |
1990 |
|
29.50 |
|
in |
1995 |
|
|
|
|
|
|
|
|
|
|
| Minimum
Barometer |
|
29.97 |
|
29.63 |
|
29.85 |
|
+00.12 |
|
30.42 |
|
in |
1979 |
|
29.09 |
|
in |
1934 |
|
|
|
|
|
|
|
|
|
|
| Average Barometer |
|
30.08 |
|
29.82 |
|
30.01 |
|
+00.06 |
|
30.60 |
|
in |
1990 |
|
29.43 |
|
in |
1995 |
|
|
|
|
|
|
|
|
|
|
| Average Wind |
|
4.5 |
|
10.8 |
|
8.1 |
|
-3.6 |
|
17.5 |
|
in |
2009 |
|
2.2 |
|
in |
1993 |
|
|
|
|
|
|
|
|
|
|
| Direction |
|
ESE |
|
WNW |
|
WNW |
|
|
|
NW |
|
|
|
|
SW |
|
|
|
|
|
|
|
|
|
|
|
|
|
| High Wind Gust |
|
19 |
|
30 |
|
25 |
|
-6 |
|
48 |
|
in |
1970 |
|
12 |
|
in |
1985 |
|
|
|
|
|
|
|
|
|
|
| Direction |
|
ESE |
|
WNW |
|
WNW |
|
|
|
WNW |
|
|
|
|
NNW |
|
|
|
|
|
|
|
|
|
|
|
|
|
| High Heat Index |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Wind Chill |
|
32 |
|
25 |
|
15 |
|
+17 |
|
|
|
|
|
|
-20 |
|
in |
1955 |
|
|
|
|
|
|
|
|
|
|
| Maximum Water Temp |
|
41.5 |
|
43.7 |
|
45.2 |
|
-3.7 |
|
50.7 |
|
in |
2006 |
|
41.5 |
|
in |
2018 |
|
|
|
|
|
|
|
|
|
|
| Minimum
Water Temp |
|
39.2 |
|
42.2 |
|
42.5 |
|
-3.3 |
|
47.3 |
|
in |
2015 |
|
38.3 |
|
in |
2005 |
|
|
|
|
|
|
|
|
|
|
| Average Water Temp |
|
40.4 |
|
43.0 |
|
43.9 |
|
-3.5 |
|
48.9 |
|
in |
2011 |
|
39.9 |
|
in |
2005 |
|
|
|
|
|
|
|
|
|
|
| Sunrise/ AM Twilight |
|
7:08:04 AM |
|
6:36:45 AM |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Sunset /
PM Twilight |
|
4:18:26 PM |
|
4:49:46 PM |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Length Of Day |
|
9:10:22 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Special Conditions |
|
None |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Comments |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
December 20, 2018 |
|
|
Record |
Record |
|
|
|
|
|
|
|
|
|
| Month-to-Date Summary |
|
Observed |
|
2017 |
|
Normal |
Depart |
Highest |
Lowest |
|
|
|
|
|
|
|
|
|
| Avg Maximum Temperature |
|
42.2 |
|
42.7 |
|
43.6 |
|
-1.3 |
|
53.3 |
|
in |
2015 |
|
31.6 |
|
in |
1904 |
|
|
|
|
|
|
|
|
|
|
| Avg
Minimum Temperature |
|
29.1 |
|
30.1 |
|
29.9 |
|
-0.8 |
|
40.9 |
|
in |
2015 |
|
16.4 |
|
in |
1989 |
|
|
|
|
|
|
|
|
|
|
| Average Temperature |
|
35.6 |
|
36.4 |
|
36.7 |
|
-1.0 |
|
47.1 |
|
in |
2015 |
|
24.7 |
|
in |
1989 |
|
|
|
|
|
|
|
|
|
|
| Total
Precipitation |
|
1.95 |
|
1.31 |
|
2.91 |
|
-.96 |
|
9.27 |
|
in |
1936 |
|
.27 |
|
in |
1998 |
|
|
|
|
|
|
|
|
|
|
| Total Snow |
|
T |
|
6.1 |
|
4.3 |
|
-4.3 |
|
21.3 |
|
in |
1981 |
|
0.0 |
|
in |
|
|
|
|
|
|
|
|
|
|
|
| Total
HDD |
|
581 |
|
567 |
|
561 |
|
+20 |
|
802 |
|
in |
1989 |
|
352 |
|
in |
2015 |
|
|
|
|
|
|
|
|
|
|
| Total CDD |
|
0 |
|
0 |
|
0 |
|
+0 |
|
807 |
|
in |
2016 |
|
290 |
|
in |
1902 |
|
|
|
|
|
|
|
|
|
|
| Avg Maximum Dew Point |
|
34.1 |
|
34.6 |
|
35.5 |
|
-1.4 |
|
47.6 |
|
in |
2015 |
|
18.0 |
|
in |
1989 |
|
|
|
|
|
|
|
|
|
|
| Avg
Minimum Dew Point |
|
19.7 |
|
20.8 |
|
18.5 |
|
+1.2 |
|
35.4 |
|
in |
2015 |
|
-0.2 |
|
in |
1989 |
|
|
|
|
|
|
|
|
|
|
| Average Dew Point |
|
26.9 |
|
27.7 |
|
26.2 |
|
+0.7 |
|
41.5 |
|
in |
2015 |
|
8.9 |
|
in |
1989 |
|
|
|
|
|
|
|
|
|
|
| |
|
December 20, 2018 |
|
|
Record |
Record |
|
|
|
|
|
|
|
|
|
| Year-to-Date Summary |
|
Observed |
|
2017 |
|
Normal |
Depart |
Highest |
Lowest |
|
|
|
|
|
|
|
|
|
| Total Precipitation |
|
51.18 |
|
40.42 |
|
46.76 |
|
+4.42 |
|
63.81 |
|
in |
1983 |
|
27.14 |
|
in |
1965 |
|
|
|
|
|
|
|
|
|
|
| Total
Snow (since Jul 1 18) |
|
4.2 |
|
6.1 |
|
5.4 |
|
-1.2 |
|
21.3 |
|
in |
1898 |
|
0.0 |
|
in |
|
|
|
|
|
|
|
|
|
|
|
| Total HDD (since Jul 1
18) |
|
1641 |
|
1364 |
|
1593 |
|
+48 |
|
2098 |
|
in |
1904 |
|
1147 |
|
in |
2015 |
|
|
|
|
|
|
|
|
|
|
| Total
CDD (since Jan 1) |
|
775 |
|
580 |
|
563 |
|
+212 |
|
807 |
|
in |
2016 |
|
290 |
|
in |
1902 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Hour-by-Hour Weather For December 20, 2018 |
|
|
|
|
| Climate Weather for December 20 |
|
|
|
|
| Weather History For December 20 |
|
|
|
|
| Weather Calendar |
|
|
|
|
| Back To Weather Stat Page |
|
|
|
|
| Home |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|