May
May · September · October
81climate match
United States · 1991–2020
Best time to visit
Rehoboth Beach.
May leads for comfortable weather in Rehoboth Beach: typically 23.3°C by day, 12.7°C at night, with 88 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high23.3°C
Typical low12.7°C
Rain in May88 mm
August
August · June · July
80climate match
October
October · April · May
79climate match
The weakest month is January, scoring 6 against May’s 81 — days reach only 8°C, 16° below the 24°C the score treats as ideal.
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
68° / -0.6°
Feb
139° / -0.3°
Mar
2612.9° / 3.1°
Apr
5618.6° / 7.9°
May
8123.3° / 12.7°
Jun
6628.4° / 18.4°
Jul
4930.8° / 21.2°
Aug
5729.7° / 20.6°
Sep
7426.1° / 17.4°
Oct
6720.6° / 10.8°
Nov
4014.8° / 5.7°
Dec
129.9° / 1.3°
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 8°C | -0.6°C | 90 mm | 8.8 | 4.3°C | 9 h 44 | 6 | Good coverage |
| February | 9°C | -0.3°C | 77 mm | 8.1 | 3.1°C | 10 h 41 | 13 | Good coverage |
| March | 12.9°C | 3.1°C | 107 mm | 9.1 | 5.1°C | 11 h 50 | 26 | Good coverage |
| April | 18.6°C | 7.9°C | 91 mm | 8.8 | 9.0°C | 13 h 09 | 56 | Good coverage |
| May | 23.3°C | 12.7°C | 88 mm | 8.3 | 14.0°C | 14 h 16 | 81 | Good coverage |
| June | 28.4°C | 18.4°C | 95 mm | 8.2 | 19.6°C | 14 h 51 | 66 | Good coverage |
| July | 30.8°C | 21.2°C | 126 mm | 8.3 | 23.1°C | 14 h 37 | 49 | Good coverage |
| August | 29.7°C | 20.6°C | 107 mm | 7.3 | 24.0°C | 13 h 40 | 57 | Good coverage |
| September | 26.1°C | 17.4°C | 113 mm | 7.3 | 22.6°C | 12 h 23 | 74 | Good coverage |
| October | 20.6°C | 10.8°C | 108 mm | 7.5 | 18.2°C | 11 h 07 | 67 | Good coverage |
| November | 14.8°C | 5.7°C | 96 mm | 7.7 | 12.4°C | 10 h 01 | 40 | Good coverage |
| December | 9.9°C | 1.3°C | 111 mm | 9.3 | 7.7°C | 9 h 28 | 12 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 25.6°C25 Jan 1950 | -23.9°C17 Jan 1982 | 87 mm28 Jan 1998 | 236 mm1948 · driest 8 mm in 1981 | 71 |
| February | 30.0°C27 Feb 1997 | -17.8°C2 Feb 1971 | 54 mm15 Feb 1953 | 174 mm1979 · driest 23 mm in 2009 | 70 |
| March | 31.7°C30 Mar 1998 | -12.8°C3 Mar 1950 | 87 mm6 Mar 1979 | 200 mm1984 · driest 3 mm in 2006 | 70 |
| April | 33.3°C21 Apr 1957 | -7.8°C7 Apr 1982 | 96 mm13 Apr 2004 | 221 mm1983 · driest 14 mm in 1985 | 71 |
| May | 36.1°C19 May 1997 | -2.8°C9 May 1947 | 103 mm30 May 1948 | 372 mm1948 · driest 5 mm in 1964 | 70 |
| June | 38.9°C21 Jun 1997 | 3.9°C5 Jun 1947 | 127 mm25 Jun 2006 | 258 mm2006 · driest 7 mm in 1971 | 72 |
| July | 38.3°C15 Jul 1995 | 8.3°C2 Jul 1965 | 132 mm10 Jul 2020 | 286 mm1989 · driest 17 mm in 1974 | 71 |
| August | 38.3°C16 Aug 1997 | 8.3°C30 Aug 1986 | 177 mm14 Aug 1953 | 349 mm1967 · driest 15 mm in 1995 | 70 |
| September | 36.7°C11 Sep 1983 | 2.8°C25 Sep 1950 | 130 mm1 Sep 2002 | 206 mm1999 · driest 11 mm in 2024 | 71 |
| October | 33.3°C4 Oct 1954 | -3.3°C31 Oct 1966 | 88 mm31 Oct 1956 | 217 mm2005 · driest 0 mm in 2024 | 70 |
| November | 31.1°C1 Nov 1950 | -8.9°C29 Nov 1955 | 97 mm25 Nov 1950 | 195 mm1948 · driest 15 mm in 2001 | 71 |
| December | 25.0°C7 Dec 1998 | -17.8°C16 Dec 1958 | 92 mm18 Dec 2023 | 237 mm1945 · driest 10 mm in 1988 | 71 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 18 | 3 | <1 |
| February | <1 | <1 | 15 | 3 | 1 |
| March | 1 | <1 | 8 | 4 | <1 |
| April | 5 | <1 | <1 | 3 | 0 |
| May | 13 | 4 | 0 | 3 | 0 |
| June | 23 | 12 | 0 | 3 | 0 |
| July | 28 | 19 | 0 | 3 | 0 |
| August | 29 | 15 | 0 | 4 | 0 |
| September | 19 | 5 | 0 | 3 | 0 |
| October | 5 | <1 | <1 | 3 | 0 |
| November | <1 | 0 | 4 | 3 | 0 |
| December | 0 | 0 | 13 | 4 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 2% | 29% | 10% | 34% | 4.0–10.6°C |
| February | 3% | 29% | 11% | 33% | 4.8–11.4°C |
| March | 10% | 29% | 12% | 35% | 9.5–14.8°C |
| April | 27% | 28% | 10% | 32% | 15.6–20.1°C |
| May | 53% | 29% | 10% | 35% | 20.5–24.6°C |
| June | 73% | 25% | 10% | 26% | 25.4–29.3°C |
| July | 73% | 27% | 11% | 31% | 27.9–31.7°C |
| August | 75% | 25% | 10% | 24% | 27.6–30.6°C |
| September | 74% | 22% | 9% | 21% | 24.3–27.2°C |
| October | 43% | 21% | 9% | 20% | 18.3–21.9°C |
| November | 14% | 25% | 11% | 24% | 12.7–17.2°C |
| December | 3% | 27% | 12% | 32% | 5.6–12.5°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 4144284
- NOAA station
- USC00075320 · LEWES
- Station distance
- 10 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 19 usable years
- Daylight
- Calculated from latitude 38.72°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 18 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.