September
September · August · June
81climate match
United States · 1991–2020
Best time to visit
Nassau.
September leads for comfortable weather in Nassau: typically 23.7°C by day, 9.5°C at night, with 67 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high23.7°C
Typical low9.5°C
Rain in September67 mm
July
July · August · June
70climate match
May
May · September · October
78climate match
The weakest month is January, scoring 5 against September’s 81 — days reach only -4.8°C, 29° 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
5-4.8° / -15.9°
Feb
5-2.3° / -13.6°
Mar
54.7° / -6.5°
Apr
3313.6° / 0.6°
May
6821.4° / 8.1°
Jun
7526.8° / 14.4°
Jul
7028.6° / 16.2°
Aug
7827.3° / 14.4°
Sep
8123.7° / 9.5°
Oct
4215.4° / 2.2°
Nov
55.9° / -5.1°
Dec
5-2° / -12.2°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -4.8°C | -15.9°C | 14 mm | 2.3 | 9 h 07 | 5 | Strong coverage |
| February | -2.3°C | -13.6°C | 17 mm | 2.7 | 10 h 20 | 5 | Strong coverage |
| March | 4.7°C | -6.5°C | 34 mm | 4.3 | 11 h 46 | 5 | Strong coverage |
| April | 13.6°C | 0.6°C | 61 mm | 7 | 13 h 25 | 33 | Strong coverage |
| May | 21.4°C | 8.1°C | 80 mm | 8.8 | 14 h 50 | 68 | Strong coverage |
| June | 26.8°C | 14.4°C | 97 mm | 9.3 | 15 h 36 | 75 | Strong coverage |
| July | 28.6°C | 16.2°C | 91 mm | 8.1 | 15 h 18 | 70 | Strong coverage |
| August | 27.3°C | 14.4°C | 83 mm | 7.2 | 14 h 05 | 78 | Strong coverage |
| September | 23.7°C | 9.5°C | 67 mm | 7.2 | 12 h 28 | 81 | Strong coverage |
| October | 15.4°C | 2.2°C | 63 mm | 6.2 | 10 h 52 | 42 | Strong coverage |
| November | 5.9°C | -5.1°C | 26 mm | 3.1 | 9 h 28 | 5 | Strong coverage |
| December | -2°C | -12.2°C | 15 mm | 3 | 8 h 47 | 5 | Strong coverage |
What has changed
Nassau runs -1.0°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
+0.1
Feb
-2.1
Mar
-0.5
Apr
-3.0
May
-1.4
Jun
-0.3
Jul
-1.5
Aug
-2.3
Sep
+0.8
Oct
-1.8
Nov
-0.4
Dec
+0.5
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 19.4°C24 Jan 1981 | -37.2°C21 Jan 1970 | 46 mm4 Jan 1997 | 72 mm1997 · driest 0 mm in 1942 | 85 |
| February | 18.9°C8 Feb 1991 | -37.8°C9 Feb 1994 | 52 mm23 Feb 1977 | 65 mm1962 · driest 0 mm in 1942 | 85 |
| March | 28.9°C19 Mar 2012 | -30.6°C11 Mar 1948 | 84 mm12 Mar 1977 | 184 mm1977 · driest 3 mm in 1941 | 83 |
| April | 35.6°C25 Apr 1962 | -17.8°C1 Apr 1975 | 73 mm5 Apr 1997 | 172 mm2001 · driest 12 mm in 1996 | 82 |
| May | 38.9°C28 May 2018 | -6.7°C11 May 1946 | 83 mm23 May 1946 | 251 mm1942 · driest 6 mm in 1976 | 84 |
| June | 40.6°C25 Jun 1988 | 0.0°C2 Jun 1964 | 114 mm17 Jun 1992 | 256 mm1953 · driest 11 mm in 1973 | 85 |
| July | 43.3°C31 Jul 1988 | 4.4°C4 Jul 1967 | 94 mm29 Jul 1989 | 249 mm1962 · driest 11 mm in 1975 | 85 |
| August | 43.3°C1 Aug 1988 | 1.1°C21 Aug 2004 | 118 mm11 Aug 2016 | 212 mm2016 · driest 14 mm in 2000 | 81 |
| September | 37.8°C2 Sep 1983 | -8.3°C22 Sep 1974 | 85 mm19 Sep 1957 | 161 mm2010 · driest 5 mm in 2024 | 80 |
| October | 35.6°C5 Oct 1963 | -15.6°C27 Oct 2020 | 81 mm14 Oct 1984 | 244 mm2009 · driest 0 mm in 1978 | 83 |
| November | 27.2°C5 Nov 2020 | -27.8°C30 Nov 1964 | 49 mm19 Nov 2024 | 107 mm1970 · driest 0 mm in 2013 | 83 |
| December | 17.2°C9 Dec 2006 | -37.2°C31 Dec 1973 | 42 mm28 Dec 1959 | 96 mm2023 · driest 0 mm in 1962 | 84 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 31 | <1 | 5 |
| February | 0 | 0 | 27 | <1 | 5 |
| March | <1 | 0 | 26 | <1 | 4 |
| April | 2 | <1 | 14 | 2 | 2 |
| May | 10 | 3 | 1 | 3 | 0 |
| June | 20 | 8 | 0 | 3 | 0 |
| July | 26 | 12 | 0 | 3 | 0 |
| August | 23 | 8 | 0 | 3 | 0 |
| September | 14 | 4 | 1 | 2 | 0 |
| October | 3 | <1 | 11 | 2 | <1 |
| November | <1 | 0 | 25 | <1 | 2 |
| December | 0 | 0 | 31 | <1 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 10% | 1% | 4% | -9.4–0.5°C |
| February | 0% | 10% | 2% | 4% | -6.6–3.4°C |
| March | 3% | 15% | 3% | 13% | -0.2–9.0°C |
| April | 19% | 24% | 7% | 26% | 10.1–18.3°C |
| May | 51% | 27% | 9% | 32% | 19.1–25.1°C |
| June | 67% | 30% | 11% | 37% | 24.9–29.1°C |
| July | 76% | 24% | 9% | 21% | 27.5–32.0°C |
| August | 76% | 23% | 9% | 21% | 26.0–31.0°C |
| September | 62% | 22% | 7% | 23% | 21.5–26.2°C |
| October | 31% | 17% | 6% | 15% | 13.9–19.7°C |
| November | 3% | 12% | 3% | 7% | 1.8–10.3°C |
| December | 0% | 10% | 1% | 5% | -6.1–2.4°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 5038922
- NOAA station
- USC00214994 · MADISON WWTP
- Station distance
- 22.7 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 45.07°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.