September is one of the warmer months of the year in Anjaw, with average highs near 18.7°C and lows around 10.7°C (mean 14.7°C). It is a relatively wet time of year, averaging 212 mm of rainfall and 85% relative humidity across the period.
September is one of the warmer months of the year in Anjaw. Across 45 years of records, the warmest September in Anjaw was 2024 — when the month averaged 16.7°C — while the coldest was 1984 at 12.9°C. Typical September days reach 18.7°C with nights near 10.7°C. The long-term trend is warming, about 0.4°C per decade.
September is a relatively wet time of year in Anjaw, averaging 212 mm of rainfall. The wettest September on record was 1990 with 439 mm, while the driest was 2005 at 69 mm.
Relative humidity in Anjaw during September averages 85%. The most humid September was 2012 at 88%, and the least humid was 2005 at 80%.
September receives about 4 kWh/m²/day of solar energy in Anjaw. The sunniest Septembers were 1998, 2021 and 2023 at 4.9 kWh/m²/day, and the cloudiest was 1991 at 3.2.
Average wind speed in Anjaw during September is 0.6 m/s. The windiest Septembers were 2006, 2007 and 2021, among others at 0.7 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.0°C | 14.5°C | 14.9°C | 14.8°C | 15.8°C | +1.8°C |
| Avg High | 17.8°C | 18.6°C | 19.2°C | 18.5°C | 19.8°C | +2°C |
| Avg Low | 10.2°C | 10.3°C | 10.6°C | 11.1°C | 11.7°C | +1.5°C |
| Avg Rain | 265 mm | 225 mm | 136 mm | 257 mm | 160 mm | -105 mm |
September temperatures in Anjaw have risen by about 2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 3.4°C (1997) to a record high of 28°C (2007).
Rainfall in September is a relatively wet time of year, averaging 212 mm, with a wettest year of 439 mm.
One of the best times to visit Anjaw
September is one of the best times to visit Anjaw. Expect days averaging 18.7°C and nights around 10.7°C (mean 14.7°C) — warmer than Anjaw's yearly average — with higher rainfall (212 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 19.8°C | 16.0°C | 12.1°C | 23.8°C | 10.9°C | 129 mm | 86% | 0.6 m/s | 4.6 |
| 2024 🔥 | 20.8°C | 16.7°C | 12.6°C | 23.4°C | 10.1°C | 165 mm | 84% | 0.6 m/s | 4.4 |
| 2023 | 20.8°C | 16.2°C | 11.5°C | 23.3°C | 9.3°C | 76 mm | 82% | 0.6 m/s | 4.9 |
| 2022 | 19.0°C | 15.2°C | 11.4°C | 21.7°C | 9.0°C | 191 mm | 86% | 0.6 m/s | 3.4 |
| 2021 | 19.8°C | 15.3°C | 10.8°C | 21.8°C | 9.1°C | 74 mm | 83% | 0.7 m/s | 4.9 |
| 2020 | 18.8°C | 15.4°C | 11.9°C | 21.4°C | 10.5°C | 326 mm | 88% | 0.6 m/s | 3.6 |
| 2019 | 18.1°C | 14.4°C | 10.7°C | 22.1°C | 6.8°C | 236 mm | 87% | 0.6 m/s | 3.7 |
| 2018 | 18.8°C | 15.1°C | 11.3°C | 22.5°C | 9.2°C | 249 mm | 86% | 0.6 m/s | 3.6 |
| 2017 | 19.1°C | 15.5°C | 11.8°C | 22.6°C | 9.9°C | 161 mm | 87% | 0.6 m/s | 3.9 |
| 2016 | 17.7°C | 14.3°C | 11.0°C | 20.2°C | 8.6°C | 260 mm | 87% | 0.6 m/s | 3.6 |
| 2015 | 18.5°C | 14.9°C | 11.3°C | 21.6°C | 8.5°C | 131 mm | 87% | 0.6 m/s | 3.9 |
| 2014 | 18.7°C | 14.8°C | 10.9°C | 22.8°C | 6.5°C | 268 mm | 85% | 0.6 m/s | 4.1 |
| 2013 | 18.6°C | 14.8°C | 11.0°C | 22.0°C | 7.9°C | 200 mm | 86% | 0.6 m/s | 4.2 |
| 2012 | 17.6°C | 14.0°C | 10.5°C | 22.2°C | 7.9°C | 421 mm | 88% | 0.6 m/s | 3.4 |
| 2011 | 19.5°C | 15.3°C | 11.1°C | 22.6°C | 8.4°C | 241 mm | 84% | 0.6 m/s | 4.2 |
| 2010 | 18.2°C | 14.6°C | 10.9°C | 22.6°C | 8.0°C | 398 mm | 86% | 0.6 m/s | 3.9 |
| 2009 | 20.1°C | 15.5°C | 10.8°C | 24.5°C | 9.0°C | 167 mm | 82% | 0.6 m/s | 4.8 |
| 2008 | 19.4°C | 14.9°C | 10.5°C | 21.0°C | 9.3°C | 165 mm | 83% | 0.6 m/s | 4.6 |
| 2007 | 19.0°C | 14.6°C | 10.1°C | 28.0°C | 7.1°C | 173 mm | 81% | 0.7 m/s | 4.1 |
| 2006 | 19.6°C | 15.2°C | 10.8°C | 23.4°C | 8.8°C | 118 mm | 82% | 0.7 m/s | 4 |
| 2005 | 20.0°C | 15.5°C | 11.1°C | 22.3°C | 8.2°C | 69 mm | 80% | 0.6 m/s | 4.3 |
| 2004 | 19.1°C | 14.7°C | 10.4°C | 22.3°C | 8.3°C | 77 mm | 84% | 0.6 m/s | 3.8 |
| 2003 | 18.7°C | 14.9°C | 11.2°C | 21.2°C | 9.3°C | 184 mm | 85% | 0.6 m/s | 4 |
| 2002 | 18.2°C | 14.0°C | 9.8°C | 20.8°C | 5.8°C | 132 mm | 83% | 0.7 m/s | 3.9 |
| 2001 | 19.3°C | 15.2°C | 11.2°C | 21.4°C | 9.3°C | 120 mm | 84% | 0.6 m/s | 4 |
| 2000 | 18.4°C | 14.2°C | 10.0°C | 22.3°C | 5.2°C | 157 mm | 83% | 0.7 m/s | 3.9 |
| 1999 | 20.0°C | 15.5°C | 11.0°C | 22.7°C | 8.7°C | 105 mm | 83% | 0.6 m/s | 4.6 |
| 1998 | 19.7°C | 15.2°C | 10.6°C | 22.5°C | 8.3°C | 92 mm | 81% | 0.6 m/s | 4.9 |
| 1997 | 17.2°C | 13.3°C | 9.4°C | 21.6°C | 3.4°C | 185 mm | 86% | 0.6 m/s | 3.6 |
| 1996 | 18.7°C | 14.6°C | 10.6°C | 23.6°C | 8.5°C | 85 mm | 83% | 0.6 m/s | 4.4 |
| 1995 | 18.0°C | 14.1°C | 10.2°C | 24.0°C | 5.9°C | 344 mm | 85% | 0.6 m/s | 4 |
| 1994 | 20.1°C | 15.3°C | 10.5°C | 22.6°C | 6.2°C | 192 mm | 82% | 0.7 m/s | 4.8 |
| 1993 | 18.0°C | 14.0°C | 10.0°C | 20.9°C | 7.5°C | 291 mm | 86% | 0.6 m/s | 4 |
| 1992 | 19.0°C | 14.7°C | 10.3°C | 22.7°C | 7.4°C | 246 mm | 83% | 0.7 m/s | 4.3 |
| 1991 | 17.8°C | 14.2°C | 10.6°C | 20.7°C | 8.9°C | 269 mm | 87% | 0.6 m/s | 3.2 |
| 1990 🌧️ | 17.7°C | 13.9°C | 10.1°C | 21.7°C | 5.8°C | 439 mm | 86% | 0.6 m/s | 3.4 |
| 1989 | 18.2°C | 14.5°C | 10.8°C | 21.2°C | 8.2°C | 319 mm | 87% | 0.6 m/s | 4.2 |
| 1988 | 17.8°C | 14.1°C | 10.4°C | 20.4°C | 7.5°C | 250 mm | 86% | 0.6 m/s | 3.5 |
| 1987 | 17.7°C | 14.1°C | 10.6°C | 20.7°C | 6.8°C | 413 mm | 87% | 0.6 m/s | 3.5 |
| 1986 | 16.9°C | 13.3°C | 9.6°C | 20.4°C | 7.3°C | 266 mm | 85% | 0.6 m/s | 3.7 |
| 1985 | 17.7°C | 13.9°C | 10.1°C | 21.8°C | 7.5°C | 243 mm | 86% | 0.6 m/s | 3.9 |
| 1984 ❄️ | 17.1°C | 12.9°C | 8.7°C | 21.0°C | 5.4°C | 268 mm | 85% | 0.7 m/s | 3.9 |
| 1983 | 18.5°C | 14.6°C | 10.7°C | 20.9°C | 9.0°C | 197 mm | 85% | 0.6 m/s | — |
| 1982 | 17.8°C | 14.0°C | 10.3°C | 22.1°C | 7.9°C | 282 mm | 86% | 0.6 m/s | — |
| 1981 | 18.3°C | 14.3°C | 10.3°C | 21.2°C | 7.5°C | 149 mm | 85% | 0.6 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 18.7°C with lows near 10.7°C (mean 14.7°C), based on 45 years of NASA POWER data.
September averages 212 mm of rainfall in Anjaw, a relatively wet time of year. The wettest on record was 439 mm in 1990.
The hottest September reached 28°C in 2007. The coldest dipped to 3.4°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2°C. Daytime highs moved from 17.9°C to 20°C and overnight lows from 10°C to 11.7°C over the same span.
September is one of the warmer months of the year in Anjaw and a relatively wet time of year, so plan for around 18.7°C daytime highs and 10.7°C at night.
Not quite — September is the 9th coolest month in Anjaw, averaging 14.7°C.
For September in Anjaw, pack light layers you can adjust through the day, with typical highs of 18.7°C and lows of 10.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 85% — quite humid.
Average wind speed in September is 0.6 m/s. The windiest September on record averaged 0.7 m/s (1984).
The wettest September on record was 1990 with 439 mm. On average, September sees 212 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 Anjaw 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.
