May
May · September · October
80climate match
United States · 1991–2020
Best time to visit
Deal Island.
May leads for comfortable weather in Deal Island: typically 25.1°C by day, 12.1°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high25.1°C
Typical low12.1°C
Rain in May82 mm
July
July · August · June
74climate match
October
October · April · May
81climate match
The weakest month is January, scoring 8 against May’s 80 — days reach only 8.9°C, 15° below the 24°C the score treats as ideal, and nights drop to -2.1°C.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
88.9° / -2.1°
Feb
159.8° / -2°
Mar
3114.6° / 1.8°
Apr
6020.3° / 6.8°
May
8025.1° / 12.1°
Jun
6129.7° / 17.4°
Jul
5232.1° / 20.2°
Aug
5631.2° / 19.1°
Sep
7727.5° / 15.3°
Oct
7321.9° / 9°
Nov
4415.9° / 3.9°
Dec
1710.8° / -0.6°
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 8.9°C | -2.1°C | 93 mm | 7.1 | 4.7°C | 9 h 47 | 8 | Good coverage |
| February | 9.8°C | -2°C | 68 mm | 6.1 | 3.7°C | 10 h 43 | 15 | Good coverage |
| March | 14.6°C | 1.8°C | 105 mm | 7.6 | 6.2°C | 11 h 50 | 31 | Good coverage |
| April | 20.3°C | 6.8°C | 93 mm | 8.2 | 11.3°C | 13 h 08 | 60 | Good coverage |
| May | 25.1°C | 12.1°C | 82 mm | 8.1 | 16.5°C | 14 h 13 | 80 | Good coverage |
| June | 29.7°C | 17.4°C | 116 mm | 8.4 | 22.0°C | 14 h 48 | 61 | Good coverage |
| July | 32.1°C | 20.2°C | 90 mm | 7.3 | 25.9°C | 14 h 34 | 52 | Good coverage |
| August | 31.2°C | 19.1°C | 100 mm | 6.9 | 26.4°C | 13 h 38 | 56 | Good coverage |
| September | 27.5°C | 15.3°C | 92 mm | 6.4 | 24.3°C | 12 h 23 | 77 | Good coverage |
| October | 21.9°C | 9°C | 75 mm | 6.4 | 19.3°C | 11 h 08 | 73 | Good coverage |
| November | 15.9°C | 3.9°C | 78 mm | 6.4 | 13.1°C | 10 h 03 | 44 | Good coverage |
| December | 10.8°C | -0.6°C | 86 mm | 7.7 | 8.2°C | 9 h 31 | 17 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 26.7°C30 Jan 2002 | -21.1°C28 Jan 1987 | 127 mm26 Jan 2004 | 196 mm1998 · driest 2 mm in 1981 | 60 |
| February | 27.2°C21 Feb 1991 | -21.1°C6 Feb 1996 | 53 mm15 Feb 1984 | 208 mm2003 · driest 8 mm in 2002 | 61 |
| March | 30.6°C14 Mar 1990 | -13.9°C4 Mar 2009 | 85 mm28 Mar 1994 | 247 mm1994 · driest 4 mm in 2006 | 60 |
| April | 35.0°C27 Apr 2009 | -6.1°C8 Apr 2002 | 61 mm16 Apr 2007 | 218 mm2004 · driest 17 mm in 2003 | 59 |
| May | 37.2°C31 May 1991 | 0.0°C11 May 1966 | 140 mm30 May 1984 | 226 mm1984 · driest 8 mm in 1964 | 60 |
| June | 38.9°C29 Jun 1959 | 5.6°C3 Jun 1996 | 107 mm2 Jun 2006 | 330 mm2006 · driest 11 mm in 1988 | 59 |
| July | 40.0°C4 Jul 1997 | 8.9°C24 Jul 1985 | 140 mm13 Jul 1996 | 243 mm1969 · driest 10 mm in 1983 | 60 |
| August | 37.8°C10 Aug 2007 | 6.1°C30 Aug 1986 | 129 mm8 Aug 1959 | 363 mm1967 · driest 4 mm in 2002 | 60 |
| September | 36.7°C4 Sep 1966 | 0.0°C21 Sep 1956 | 165 mm10 Sep 1977 | 275 mm1977 · driest 13 mm in 1978 | 60 |
| October | 35.0°C6 Oct 2007 | -4.4°C30 Oct 1990 | 79 mm26 Oct 1971 | 193 mm1971 · driest 2 mm in 2000 | 60 |
| November | 28.3°C2 Nov 2003 | -10.0°C24 Nov 1989 | 74 mm13 Nov 1975 | 178 mm1963 · driest 6 mm in 2001 | 59 |
| December | 26.7°C8 Dec 1998 | -19.4°C16 Dec 1958 | 85 mm25 Dec 1986 | 217 mm1969 · driest 8 mm in 1988 | 60 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | <1 | 0 | 19 | 3 |
| February | <1 | 0 | 19 | 2 |
| March | 1 | <1 | 12 | 3 |
| April | 6 | <1 | 2 | 3 |
| May | 15 | 4 | 0 | 3 |
| June | 25 | 16 | 0 | 3 |
| July | 28 | 23 | 0 | 2 |
| August | 28 | 21 | 0 | 3 |
| September | 22 | 8 | 0 | 3 |
| October | 8 | 1 | <1 | 2 |
| November | <1 | 0 | 8 | 3 |
| December | <1 | 0 | 17 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 2% | 25% | 10% | 29% | 4.7–11.1°C |
| February | 2% | 26% | 10% | 27% | 5.7–11.8°C |
| March | 12% | 27% | 12% | 32% | 11.4–16.0°C |
| April | 38% | 28% | 11% | 30% | 17.8–22.2°C |
| May | 67% | 25% | 10% | 28% | 23.0–26.5°C |
| June | 76% | 24% | 10% | 22% | 27.8–31.0°C |
| July | 75% | 25% | 9% | 28% | 30.0–33.1°C |
| August | 76% | 24% | 12% | 21% | 29.3–32.2°C |
| September | 79% | 20% | 9% | 17% | 25.7–28.8°C |
| October | 53% | 20% | 8% | 19% | 19.7–23.6°C |
| November | 17% | 23% | 10% | 20% | 13.4–17.9°C |
| December | 3% | 25% | 10% | 29% | 6.4–12.8°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page
Nearby, measured,
and named.
- Place identity
- GeoNames 4352881
- NOAA station
- USC00189140 · VIENNA
- Station distance
- 38.2 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 17 usable years
- Daylight
- Calculated from latitude 38.16°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 16 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.