September
September · May · June
82climate match
United States · 1991–2020
Best time to visit
Naples.
September leads for comfortable weather in Naples: typically 25.2°C by day, 7.8°C at night, with 30 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high25.2°C
Typical low7.8°C
Rain in September30 mm
August
August · July · June
71climate match
May
May · September · October
83climate match
The weakest month is January, scoring 5 against September’s 82 — days reach only -1.8°C, 26° 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
5-1.8° / -13.2°
Feb
53.1° / -9.1°
Mar
2611.6° / -3.2°
Apr
4816.5° / 0.6°
May
7522.2° / 5.3°
Jun
7528.7° / 10.1°
Jul
7032.8° / 14.3°
Aug
7330.7° / 12.7°
Sep
8225.2° / 7.8°
Oct
5116.7° / 1.2°
Nov
128.2° / -5°
Dec
5-0.7° / -11.6°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -1.8°C | -13.2°C | 13 mm | 3.5 | 9 h 35 | 5 | Good coverage |
| February | 3.1°C | -9.1°C | 13 mm | 3.4 | 10 h 36 | 5 | Good coverage |
| March | 11.6°C | -3.2°C | 17 mm | 3.5 | 11 h 49 | 26 | Good coverage |
| April | 16.5°C | 0.6°C | 18 mm | 4.4 | 13 h 13 | 48 | Good coverage |
| May | 22.2°C | 5.3°C | 23 mm | 4.5 | 14 h 24 | 75 | Good coverage |
| June | 28.7°C | 10.1°C | 12 mm | 2.3 | 15 h 02 | 75 | Good coverage |
| July | 32.8°C | 14.3°C | 12 mm | 3.1 | 14 h 47 | 70 | Good coverage |
| August | 30.7°C | 12.7°C | 17 mm | 3.5 | 13 h 46 | 73 | Good coverage |
| September | 25.2°C | 7.8°C | 30 mm | 4.2 | 12 h 25 | 82 | Good coverage |
| October | 16.7°C | 1.2°C | 24 mm | 3.6 | 11 h 03 | 51 | Good coverage |
| November | 8.2°C | -5°C | 12 mm | 2.9 | 9 h 53 | 12 | Good coverage |
| December | -0.7°C | -11.6°C | 15 mm | 3.8 | 9 h 18 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 11.1°C30 Jan 2024 | -29.3°C15 Jan 2007 | 17 mm17 Jan 2019 | 40 mm2005 · driest 0 mm in 2025 | 28 |
| February | 18.3°C25 Feb 2026 | -28.8°C1 Feb 2023 | 16 mm11 Feb 2017 | 41 mm2019 · driest 0 mm in 2015 | 29 |
| March | 29.4°C25 Mar 2026 | -16.1°C2 Mar 2002 | 20 mm2 Mar 2015 | 41 mm2016 · driest 0 mm in 2026 | 29 |
| April | 29.4°C23 Apr 2012 | -10.5°C14 Apr 2020 | 12 mm30 Apr 2019 | 54 mm1999 · driest 3 mm in 2023 | 29 |
| May | 35.6°C31 May 2002 | -6.1°C11 May 1999 | 31 mm8 May 2016 | 86 mm2015 · driest 0 mm in 2002 | 29 |
| June | 38.9°C16 Jun 2021 | -1.1°C13 Jun 2001 | 21 mm4 Jun 2008 | 47 mm1998 · driest 0 mm in 2012 | 29 |
| July | 40.0°C9 Jul 2021 | 5.6°C5 Jul 2010 | 31 mm30 Jul 2021 | 53 mm2021 · driest 0 mm in 2003 | 29 |
| August | 38.3°C3 Aug 2020 | 4.4°C31 Aug 2005 | 23 mm27 Aug 2014 | 102 mm2014 · driest 0 mm in 2020 | 28 |
| September | 36.7°C6 Sep 2022 | -3.3°C29 Sep 1999 | 62 mm22 Sep 2016 | 105 mm2016 · driest 1 mm in 2018 | 28 |
| October | 28.9°C3 Oct 2025 | -17.1°C30 Oct 2019 | 33 mm21 Oct 2004 | 80 mm2004 · driest 0 mm in 2020 | 28 |
| November | 20.6°C1 Nov 2014 | -18.9°C23 Nov 2003 | 12 mm9 Nov 2004 | 25 mm2004 · driest 1 mm in 2023 | 28 |
| December | 14.4°C25 Dec 2025 | -29.4°C23 Dec 1998 | 18 mm3 Dec 2013 | 60 mm2010 · driest 1 mm in 2023 | 28 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 31 | <1 |
| February | 0 | 0 | 28 | <1 |
| March | <1 | 0 | 26 | <1 |
| April | 1 | 0 | 14 | <1 |
| May | 11 | 2 | 3 | <1 |
| June | 23 | 15 | <1 | <1 |
| July | 30 | 26 | 0 | <1 |
| August | 29 | 21 | 0 | <1 |
| September | 18 | 5 | <1 | <1 |
| October | 2 | 0 | 13 | <1 |
| November | 0 | 0 | 27 | <1 |
| December | 0 | 0 | 31 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 10% | <1% | 9% | -6.8–3.6°C |
| February | 0% | 11% | <1% | 6% | -2.3–7.0°C |
| March | 8% | 11% | 1% | 5% | 8.2–15.0°C |
| April | 31% | 13% | <1% | 8% | 14.2–18.6°C |
| May | 64% | 14% | 1% | 11% | 19.1–24.5°C |
| June | 91% | 7% | 1% | 4% | 26.4–31.9°C |
| July | 91% | 9% | <1% | 5% | 31.0–35.0°C |
| August | 89% | 11% | 2% | 7% | 29.3–32.3°C |
| September | 80% | 13% | 3% | 10% | 23.4–27.4°C |
| October | 31% | 12% | 3% | 7% | 14.1–19.1°C |
| November | <1% | 9% | <1% | 4% | 5.8–11.1°C |
| December | 0% | 11% | <1% | 9% | -5.5–4.2°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 5778807
- NOAA station
- USW00094030 · VERNAL MUNI AP
- Station distance
- 2.1 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 22 usable years
- Daylight
- Calculated from latitude 40.43°, 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.