September is one of the warmer months of the year in Diu, with average highs near 28.5°C and lows around 27°C (mean 27.8°C). It is a relatively wet time of year, averaging 120 mm of rainfall and 81% relative humidity across the period.
September is one of the warmer months of the year in Diu. Across 45 years of records, the warmest September in Diu was 1998 — when the month averaged 28.6°C — while the coldest was 1984 at 26.7°C. Typical September days reach 28.5°C with nights near 27°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Diu, averaging 120 mm of rainfall. The wettest September on record was 2021 with 480 mm, while the driest was 1987 at 2 mm.
Relative humidity in Diu during September averages 81%. The most humid September was 2005 at 86%, and the least humid was 1986 at 77%.
September receives about 5.3 kWh/m²/day of solar energy in Diu. The sunniest September was 1987 at 6 kWh/m²/day, and the cloudiest was 2019 at 3.9.
Average wind speed in Diu during September is 4.6 m/s. The windiest September was 2021 at 5.6 m/s, while the calmest was 2020 at 3.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.7°C | 27.7°C | 27.8°C | 27.8°C | 28.1°C | +0.4°C |
| Avg High | 28.5°C | 28.5°C | 28.6°C | 28.5°C | 28.7°C | +0.2°C |
| Avg Low | 26.9°C | 26.9°C | 27.1°C | 27.1°C | 27.4°C | +0.5°C |
| Avg Rain | 74 mm | 81 mm | 100 mm | 159 mm | 221 mm | +147 mm |
September temperatures in Diu have risen by about 0.5°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 24.7°C (1984) to a record high of 33.8°C (2001).
Rainfall in September is a relatively wet time of year, averaging 120 mm, with a wettest year of 480 mm.
A quieter season to visit Diu
If your dates are flexible, the more temperate months of January and February tend to be the most comfortable for visiting Diu. That said, September — with days averaging 28.5°C and nights around 27°C (mean 27.8°C) and higher rainfall (120 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 28.2°C | 27.6°C | 26.9°C | 30.4°C | 26.0°C | 219 mm | 84% | 4.6 m/s | 4.4 |
| 2024 | 28.7°C | 28.1°C | 27.4°C | 29.6°C | 26.6°C | 180 mm | 83% | 4.8 m/s | 4.8 |
| 2023 | 28.9°C | 28.3°C | 27.6°C | 30.8°C | 26.6°C | 70 mm | 83% | 4.5 m/s | 5.3 |
| 2022 | 28.7°C | 28.0°C | 27.3°C | 30.3°C | 26.7°C | 236 mm | 82% | 4.3 m/s | 5.1 |
| 2021 🌧️ | 28.4°C | 27.9°C | 27.4°C | 29.0°C | 26.9°C | 480 mm | 85% | 5.6 m/s | 4.1 |
| 2020 | 29.1°C | 28.5°C | 27.8°C | 30.1°C | 27.0°C | 138 mm | 81% | 3.7 m/s | 5 |
| 2019 | 28.6°C | 28.1°C | 27.7°C | 29.4°C | 27.1°C | 303 mm | 86% | 5.4 m/s | 3.9 |
| 2018 | 28.0°C | 27.0°C | 26.1°C | 31.9°C | 25.5°C | 16 mm | 81% | 4.5 m/s | 5.7 |
| 2017 | 28.8°C | 27.9°C | 27.1°C | 29.9°C | 26.3°C | 79 mm | 82% | 3.8 m/s | 5.2 |
| 2016 | 28.3°C | 27.5°C | 26.7°C | 29.2°C | 26.1°C | 170 mm | 82% | 5 m/s | 5.1 |
| 2015 | 29.0°C | 28.2°C | 27.4°C | 30.8°C | 26.3°C | 109 mm | 78% | 4.3 m/s | 5.4 |
| 2014 | 28.4°C | 27.8°C | 27.2°C | 30.2°C | 26.7°C | 112 mm | 81% | 4.4 m/s | 5.2 |
| 2013 | 28.4°C | 27.8°C | 27.2°C | 30.3°C | 26.3°C | 240 mm | 83% | 5 m/s | 4.9 |
| 2012 | 28.6°C | 27.8°C | 27.1°C | 31.4°C | 26.4°C | 198 mm | 82% | 5.2 m/s | 4.7 |
| 2011 | 28.1°C | 27.6°C | 27.1°C | 29.2°C | 26.5°C | 158 mm | 82% | 4.7 m/s | 4.8 |
| 2010 | 28.8°C | 28.1°C | 27.5°C | 30.4°C | 26.3°C | 202 mm | 82% | 4.5 m/s | 5 |
| 2009 | 29.1°C | 28.2°C | 27.4°C | 31.4°C | 26.6°C | 40 mm | 81% | 4.4 m/s | 5.9 |
| 2008 | 28.5°C | 27.7°C | 26.9°C | 30.9°C | 26.1°C | 241 mm | 82% | 4.2 m/s | 5 |
| 2007 | 28.8°C | 28.3°C | 27.7°C | 29.4°C | 25.9°C | 231 mm | 83% | 4.4 m/s | 5.2 |
| 2006 | 28.4°C | 27.8°C | 27.2°C | 29.5°C | 25.6°C | 101 mm | 83% | 4.3 m/s | 5.5 |
| 2005 | 28.2°C | 27.5°C | 26.9°C | 30.3°C | 25.9°C | 235 mm | 86% | 5.4 m/s | 4.4 |
| 2004 | 28.6°C | 27.9°C | 27.2°C | 29.9°C | 26.1°C | 33 mm | 82% | 4 m/s | 5.6 |
| 2003 | 28.3°C | 27.7°C | 27.1°C | 29.6°C | 26.6°C | 64 mm | 82% | 4.9 m/s | 5.3 |
| 2002 | 28.3°C | 27.4°C | 26.6°C | 30.8°C | 25.7°C | 23 mm | 79% | 4.6 m/s | 5.8 |
| 2001 | 28.8°C | 27.9°C | 27.0°C | 33.8°C | 26.1°C | 21 mm | 81% | 4 m/s | 5.6 |
| 2000 | 28.6°C | 27.7°C | 26.8°C | 30.4°C | 25.8°C | 9 mm | 80% | 4.4 m/s | 5.5 |
| 1999 | 28.7°C | 27.9°C | 27.2°C | 31.0°C | 26.6°C | 50 mm | 80% | 5.4 m/s | 5.7 |
| 1998 🔥 | 29.4°C | 28.6°C | 27.9°C | 31.0°C | 27.0°C | 105 mm | 81% | 5.2 m/s | 5.6 |
| 1997 | 28.4°C | 27.8°C | 27.2°C | 30.0°C | 26.4°C | 98 mm | 80% | 4.6 m/s | 5.7 |
| 1996 | 27.8°C | 27.0°C | 26.2°C | 30.5°C | 25.6°C | 21 mm | 81% | 4.5 m/s | 5.6 |
| 1995 | 29.0°C | 28.1°C | 27.3°C | 31.2°C | 26.8°C | 58 mm | 79% | 4.8 m/s | 5.6 |
| 1994 | 27.8°C | 27.1°C | 26.4°C | 30.8°C | 25.0°C | 128 mm | 77% | 5.1 m/s | 5.5 |
| 1993 | 28.8°C | 28.0°C | 27.2°C | 30.3°C | 26.4°C | 135 mm | 79% | 5.4 m/s | 5.2 |
| 1992 | 28.7°C | 27.7°C | 26.7°C | 31.0°C | 25.2°C | 144 mm | 78% | 4.7 m/s | 5.3 |
| 1991 | 28.0°C | 27.1°C | 26.2°C | 31.1°C | 25.6°C | 9 mm | 80% | 4.5 m/s | 5.5 |
| 1990 | 28.0°C | 27.4°C | 26.8°C | 29.0°C | 26.2°C | 61 mm | 82% | 4.7 m/s | 5.4 |
| 1989 | 28.4°C | 27.6°C | 26.9°C | 30.4°C | 26.0°C | 36 mm | 81% | 4 m/s | 5.6 |
| 1988 | 29.2°C | 28.5°C | 27.9°C | 31.0°C | 27.0°C | 193 mm | 84% | 4.2 m/s | 5 |
| 1987 | 29.2°C | 28.3°C | 27.3°C | 32.2°C | 26.6°C | 2 mm | 78% | 5.2 m/s | 6 |
| 1986 | 28.4°C | 27.3°C | 26.1°C | 32.2°C | 25.0°C | 8 mm | 77% | 4.9 m/s | 5.9 |
| 1985 | 28.3°C | 27.5°C | 26.7°C | 32.1°C | 25.9°C | 21 mm | 77% | 4.6 m/s | 5.8 |
| 1984 ❄️ | 27.7°C | 26.7°C | 25.6°C | 31.1°C | 24.7°C | 120 mm | 82% | 4.7 m/s | 5.5 |
| 1983 | 28.7°C | 28.1°C | 27.5°C | 30.7°C | 26.2°C | 125 mm | 83% | 4 m/s | — |
| 1982 | 28.2°C | 27.5°C | 26.7°C | 30.1°C | 24.9°C | 54 mm | 78% | 4 m/s | — |
| 1981 | 28.8°C | 27.9°C | 27.1°C | 31.1°C | 26.4°C | 103 mm | 83% | 3.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 28.5°C with lows near 27°C (mean 27.8°C), based on 45 years of NASA POWER data.
September averages 120 mm of rainfall in Diu, a relatively wet time of year. The wettest on record was 480 mm in 2021.
The hottest September reached 33.8°C in 2001. The coldest dipped to 24.7°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.5°C. Daytime highs moved from 28.3°C to 28.6°C and overnight lows from 26.7°C to 27.3°C over the same span.
September is one of the warmer months of the year in Diu and a relatively wet time of year, so plan for around 28.5°C daytime highs and 27°C at night.
Not quite — September is the 7th coolest month in Diu, averaging 27.8°C.
For September in Diu, pack light layers you can adjust through the day, with typical highs of 28.5°C and lows of 27°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 81% — quite humid.
Average wind speed in September is 4.6 m/s. The windiest September on record averaged 5.6 m/s (2021).
The wettest September on record was 2021 with 480 mm. On average, September sees 120 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Diu behaves each September, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for September specifically, along with year-by-year records and how the month has changed over the decades.
