May
May · September · June
81climate match
United States · 1991–2020
Best time to visit
Deltaville.
May leads for comfortable weather in Deltaville: typically 23.5°C by day, 13.9°C at night, with 115 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high23.5°C
Typical low13.9°C
Rain in May115 mm
August
August · July · June
74climate match
April
April · October · May
76climate match
The weakest month is January, scoring 7 against May’s 81 — days reach only 8.2°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
78.2° / -1.8°
Feb
159.6° / -1.4°
Mar
3213.9° / 2.4°
Apr
5719.2° / 8°
May
8123.5° / 13.9°
Jun
6527.7° / 18.6°
Jul
4829.7° / 21.1°
Aug
5329.1° / 20.6°
Sep
6926.1° / 17.6°
Oct
6420.6° / 10.8°
Nov
4215.5° / 4.7°
Dec
1710.8° / 0.6°
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 8.2°C | -1.8°C | 81 mm | 7.7 | 5.3°C | 9 h 50 | 7 | Good coverage |
| February | 9.6°C | -1.4°C | 64 mm | 7.3 | 4.2°C | 10 h 45 | 15 | Good coverage |
| March | 13.9°C | 2.4°C | 85 mm | 8.4 | 6.7°C | 11 h 50 | 32 | Good coverage |
| April | 19.2°C | 8°C | 108 mm | 7.9 | 11.6°C | 13 h 07 | 57 | Good coverage |
| May | 23.5°C | 13.9°C | 115 mm | 8.1 | 16.7°C | 14 h 10 | 81 | Good coverage |
| June | 27.7°C | 18.6°C | 118 mm | 8.7 | 22.1°C | 14 h 44 | 65 | Good coverage |
| July | 29.7°C | 21.1°C | 155 mm | 8.9 | 25.8°C | 14 h 31 | 48 | Good coverage |
| August | 29.1°C | 20.6°C | 145 mm | 8.2 | 26.4°C | 13 h 36 | 53 | Good coverage |
| September | 26.1°C | 17.6°C | 145 mm | 7 | 24.3°C | 12 h 23 | 69 | Good coverage |
| October | 20.6°C | 10.8°C | 132 mm | 7.1 | 19.5°C | 11 h 09 | 64 | Good coverage |
| November | 15.5°C | 4.7°C | 92 mm | 6.3 | 13.3°C | 10 h 06 | 42 | Good coverage |
| December | 10.8°C | 0.6°C | 101 mm | 7.8 | 8.6°C | 9 h 35 | 17 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 25.6°C31 Jan 2002 | -17.8°C6 Jan 2018 | 73 mm18 Jan 2010 | 181 mm2022 · driest 32 mm in 2026 | 22 |
| February | 26.7°C23 Feb 2023 | -17.8°C21 Feb 2015 | 34 mm15 Feb 2026 | 147 mm2003 · driest 8 mm in 2009 | 21 |
| March | 30.0°C11 Mar 2026 | -10.6°C3 Mar 2009 | 71 mm17 Mar 2025 | 215 mm2024 · driest 5 mm in 2006 | 23 |
| April | 33.3°C18 Apr 2002 | -2.8°C6 Apr 2016 | 71 mm23 Apr 2006 | 164 mm2007 · driest 13 mm in 2024 | 23 |
| May | 34.4°C18 May 2026 | 1.1°C13 May 2017 | 66 mm17 May 2023 | 263 mm2016 · driest 44 mm in 2021 | 23 |
| June | 36.7°C30 Jun 2012 | 7.8°C1 Jun 2023 | 75 mm12 Jun 2021 | 266 mm2006 · driest 36 mm in 2002 | 23 |
| July | 37.8°C8 Jul 2010 | 12.8°C12 Jul 2002 | 106 mm27 Jul 2009 | 281 mm2011 · driest 40 mm in 2007 | 21 |
| August | 36.7°C9 Aug 2007 | 13.3°C7 Aug 2004 | 266 mm28 Aug 2011 | 321 mm2011 · driest 14 mm in 2016 | 21 |
| September | 33.9°C3 Sep 2014 | 9.4°C22 Sep 2006 | 238 mm2 Sep 2006 | 374 mm2006 · driest 41 mm in 2007 | 21 |
| October | 32.8°C10 Oct 2007 | 0.0°C31 Oct 2008 | 175 mm1 Oct 2010 | 236 mm2012 · driest 1 mm in 2024 | 21 |
| November | 26.1°C7 Nov 2022 | -6.7°C19 Nov 2014 | 109 mm13 Nov 2009 | 244 mm2009 · driest 15 mm in 2012 | 22 |
| December | 24.4°C13 Dec 2007 | -13.9°C24 Dec 2022 | 89 mm25 Dec 2020 | 205 mm2009 · driest 31 mm in 2011 | 22 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | <1 | 0 | 22 | 3 | 2 |
| February | <1 | 0 | 20 | 2 | 1 |
| March | 1 | 0 | 12 | 3 | <1 |
| April | 6 | <1 | <1 | 4 | <1 |
| May | 13 | 2 | 0 | 4 | 0 |
| June | 25 | 8 | 0 | 4 | 0 |
| July | 30 | 16 | 0 | 5 | 0 |
| August | 27 | 11 | 0 | 4 | 0 |
| September | 18 | 3 | 0 | 3 | 0 |
| October | 6 | <1 | <1 | 3 | 0 |
| November | <1 | 0 | 6 | 3 | 0 |
| December | 0 | 0 | 16 | 3 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 3% | 24% | 9% | 22% | 5.8–11.6°C |
| February | 6% | 27% | 9% | 33% | 6.0–13.4°C |
| March | 20% | 26% | 10% | 27% | 11.5–17.4°C |
| April | 38% | 25% | 11% | 24% | 17.8–21.6°C |
| May | 61% | 27% | 12% | 30% | 21.4–25.7°C |
| June | 72% | 27% | 12% | 31% | 26.3–29.9°C |
| July | 71% | 29% | 16% | 32% | 28.5–31.3°C |
| August | 74% | 25% | 12% | 26% | 27.3–30.4°C |
| September | 75% | 24% | 11% | 25% | 25.0–27.8°C |
| October | 49% | 22% | 9% | 21% | 19.5–22.3°C |
| November | 17% | 20% | 8% | 16% | 13.6–17.9°C |
| December | 4% | 24% | 10% | 19% | 9.0–14.0°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 4755710
- NOAA station
- USC00446161 · N
- Station distance
- 16.4 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 15 usable years
- Daylight
- Calculated from latitude 37.55°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 20 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.