| Portsmouth Rhode Island Weather Almanac |
|
|
| Wednesday,
September 18, 2024 |
|
|
| Dense Fog
early then Mostly Cloudy, Light Winds and Cooler |
|
|
| |
|
Climate
Normal Period |
Climate Record Period |
|
| |
|
1991 -
2020 |
1893 - 2024 |
|
| |
|
September 18, 2024 |
|
Record |
|
Record |
|
|
| Observed Daily Data |
|
2024 |
|
2023 |
|
Norm |
|
Depart |
|
Highest |
|
Lowest |
|
|
| Maximum Temperature |
|
72 |
|
66 |
|
71 |
|
+1 |
|
84 |
|
in |
1914 |
|
58 |
|
in |
1996 |
|
|
| Minimum
Temperature |
|
59 |
|
63 |
|
57 |
|
+2 |
|
68 |
|
in |
2016 |
|
41 |
|
in |
1990 |
|
|
| Average Temperature |
|
66 |
|
65 |
|
64 |
|
+2 |
|
74 |
|
in |
2016 |
|
52 |
|
in |
1990 |
|
|
| Month Avg Max Temperature |
|
76.0 |
|
79.4 |
|
73.9 |
|
+2.1 |
|
80.9 |
|
in |
1983 |
|
68.4 |
|
in |
1917 |
|
|
| Month
Avg Min Temperature |
|
57.2 |
|
64.6 |
|
59.1 |
|
-1.9 |
|
64.6 |
|
in |
2023 |
|
52.8 |
|
in |
1975 |
|
|
| Month Average
Temperature |
|
66.7 |
|
72.2 |
|
66.5 |
|
+0.2 |
|
72.4 |
|
in |
1961 |
|
61.4 |
|
in |
1963 |
|
|
| High
Heat Index |
|
74 |
|
67 |
|
72 |
|
+2 |
|
89 |
|
in |
1992 |
|
|
|
|
|
|
|
| Low
Wind Chill |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
36 |
|
in |
1990 |
|
|
| Heating Degree Days |
|
0 |
|
0 |
|
3 |
|
-3 |
|
13 |
|
in |
1990 |
|
0 |
|
in |
2024 |
|
|
| Month Heating DD |
|
8 |
|
5 |
|
26 |
|
-18 |
|
85 |
|
in |
1913 |
|
0 |
|
in |
2015 |
|
|
| Season
Heating DD |
|
10 |
|
5 |
|
33 |
|
-23 |
|
97 |
|
in |
1913 |
|
0 |
|
in |
2015 |
|
|
| Cooling Degree Days |
|
1 |
|
0 |
|
2 |
|
-1 |
|
9 |
|
in |
2016 |
|
0 |
|
in |
2023 |
|
|
| Month Cooling DD |
|
39 |
|
135 |
|
53 |
|
-14 |
|
148 |
|
in |
1961 |
|
7 |
|
in |
1975 |
|
|
| Year Cooling DD |
|
685 |
|
707 |
|
590 |
|
+95 |
|
840 |
|
in |
2020 |
|
280 |
|
in |
1902 |
|
|
| Maximum Dew Point |
|
68 |
|
66 |
|
62 |
|
+6 |
|
73 |
|
in |
2018 |
|
41 |
|
in |
1990 |
|
|
| Minimum
Dew Point |
|
59 |
|
60 |
|
52 |
|
+7 |
|
67 |
|
in |
2018 |
|
32 |
|
in |
1959 |
|
|
| Average Dew Point |
|
64 |
|
63 |
|
57 |
|
+7 |
|
70 |
|
in |
2018 |
|
37 |
|
in |
1990 |
|
|
| Month Avg Max Dew Point |
|
63.9 |
|
70.7 |
|
64.1 |
|
-0.1 |
|
70.7 |
|
in |
2023 |
|
55.2 |
|
in |
1975 |
|
|
| Month
Avg Min Dew Point |
|
53.2 |
|
62.4 |
|
54.6 |
|
-1.4 |
|
62.4 |
|
in |
2023 |
|
44.4 |
|
in |
1984 |
|
|
| Month Average Dew Point |
|
58.8 |
|
66.7 |
|
59.3 |
|
-0.4 |
|
66.7 |
|
in |
2023 |
|
49.9 |
|
in |
1984 |
|
|
| Precipitation |
|
.00 |
|
1.37 |
|
.14 |
|
-.14 |
|
2.85 |
|
in |
1936 |
|
|
|
|
|
|
|
| One
Hour Rain |
|
.00 |
|
.26 |
|
|
|
|
|
.69 |
|
in |
2004 |
|
|
|
|
|
|
|
| Half
Hour Rain |
|
.00 |
|
.26 |
|
|
|
|
|
.43 |
|
in |
2018 |
|
|
|
|
|
|
|
| Hourly Rain Rate |
|
.00 |
|
.53 |
|
|
|
|
|
3.49 |
|
in |
2018 |
|
|
|
|
|
|
|
| Month Precipitation |
|
.16 |
|
3.85 |
|
2.19 |
|
-2.03 |
|
8.56 |
|
in |
2021 |
|
.06 |
|
in |
1946 |
|
|
| Year Precipitation |
|
40.85 |
|
39.47 |
|
31.60 |
|
+9.25 |
|
46.35 |
|
in |
1998 |
|
17.53 |
|
in |
1957 |
|
|
| Snow |
|
0.0 |
|
0.0 |
|
0.0 |
|
+0.0 |
|
0.0 |
|
in |
1900 |
|
|
|
|
|
|
|
| Snow Depth |
|
0 |
|
0 |
|
0 |
|
+0 |
|
0 |
|
in |
|
|
|
|
|
|
|
|
| Month Snow |
|
#N/A |
|
#N/A |
|
#N/A |
|
#N/A |
|
#N/A |
|
in |
#N/A |
|
#N/A |
|
in |
Many |
|
|
| Season Snow |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
September
18, 2024 |
|
|
Record |
Record |
|
| Observed Daily Data |
|
2024 |
|
2023 |
|
Norm |
|
Depart |
|
Highest |
Lowest |
|
| Maximum Humidity |
|
99% |
|
99% |
|
94% |
|
+5% |
|
100% |
|
in |
2018 |
|
78% |
|
in |
1968 |
|
|
| Minimum
Humidity |
|
85% |
|
87% |
|
61% |
|
+24% |
|
96% |
|
in |
1993 |
|
35% |
|
in |
1968 |
|
|
| Average Humidity |
|
92% |
|
93% |
|
78% |
|
+14% |
|
98% |
|
in |
1993 |
|
57% |
|
in |
1968 |
|
|
| Maximum Barometer |
|
30.17 |
|
29.93 |
|
30.14 |
|
+00.03 |
|
30.65 |
|
in |
1947 |
|
29.66 |
|
in |
1996 |
|
|
| Minimum
Barometer |
|
29.97 |
|
29.62 |
|
29.92 |
|
+00.05 |
|
30.39 |
|
in |
1985 |
|
29.38 |
|
in |
1996 |
|
|
| Average Barometer |
|
30.07 |
|
29.78 |
|
30.03 |
|
+00.04 |
|
30.42 |
|
in |
2011 |
|
29.52 |
|
in |
1996 |
|
|
| Average
Wind |
|
3.7 |
|
7.4 |
|
6.1 |
|
-2.4 |
|
14.0 |
|
in |
2004 |
|
1.2 |
|
in |
2001 |
|
|
| Direction |
|
E |
|
SE |
|
NNE |
|
|
|
N |
|
|
|
|
NW |
|
|
|
|
|
| High
Wind Gust |
|
11 |
|
29 |
|
21 |
|
-10 |
|
38 |
|
in |
2004 |
|
10 |
|
in |
1951 |
|
|
| Direction |
|
ENE |
|
WNW |
|
SSW |
|
|
|
N |
|
|
|
|
SW |
|
|
|
|
|
| Maximum Water Temp |
|
68.5 |
|
69.1 |
|
68.2 |
|
+0.3 |
|
71.2 |
|
in |
2015 |
|
64.0 |
|
in |
1996 |
|
|
| Minimum
Water Temp |
|
67.1 |
|
66.7 |
|
66.2 |
|
+0.9 |
|
69.6 |
|
in |
2018 |
|
62.6 |
|
in |
2013 |
|
|
| Average Water Temp |
|
67.8 |
|
67.9 |
|
67.2 |
|
+0.6 |
|
70.3 |
|
in |
2018 |
|
63.5 |
|
in |
1996 |
|
|
| Sunrise/ AM Twilight |
|
6:28:56 AM |
|
6:01:26 AM |
|
|
|
|
|
|
|
| Sunset
/ PM Twilight |
|
6:48:14 PM |
|
7:17:01 PM |
|
|
|
|
|
|
|
| Length Of Day |
|
12:19:18 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Special
Conditions |
|
Dense Fog |
|
|
| Comments |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Hour-by-Hour Weather For September 18, 2024 |
|
| Climate Weather for September 18 |
|
| Weather History For September 18 |
|
| Weather Calendar |
|
| Back To Weather Stat Page |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|