September is close to Lalitpur's year-round average, with average highs near 30.5°C and lows around 22.2°C (mean 26.4°C). It is a relatively wet time of year, averaging 149 mm of rainfall and 82% relative humidity across the period.
September is close to Lalitpur's year-round average. Across 45 years of records, the warmest September in Lalitpur was 2000 — when the month averaged 28.1°C — while the coldest was 1984 at 25.2°C. Typical September days reach 30.5°C with nights near 22.2°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Lalitpur, averaging 149 mm of rainfall. The wettest September on record was 1993 with 389 mm, while the driest was 1991 at 18 mm.
Relative humidity in Lalitpur during September averages 82%. The most humid September was 2019 at 91%, and the least humid was 2000 at 68%.
September receives about 5 kWh/m²/day of solar energy in Lalitpur. The sunniest Septembers were 1986 and 2001 at 5.8 kWh/m²/day, and the cloudiest was 2003 at 3.4.
Average wind speed in Lalitpur during September is 2 m/s. The windiest September was 2018 at 2.7 m/s, while the calmest was 2004 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.4°C | 26.1°C | 26.5°C | 26.2°C | 26.8°C | +0.4°C |
| Avg High | 30.7°C | 30.1°C | 31.0°C | 30.2°C | 30.4°C | -0.3°C |
| Avg Low | 22.0°C | 22.0°C | 22.1°C | 22.3°C | 23.2°C | +1.2°C |
| Avg Rain | 135 mm | 187 mm | 129 mm | 136 mm | 163 mm | +28 mm |
September temperatures in Lalitpur have risen by about 0.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 15.7°C (1982) to a record high of 37.1°C (2000).
Rainfall in September is a relatively wet time of year, averaging 149 mm, with a wettest year of 389 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.3°C per decade, narrowing the gap between day and night.
A good time to visit Lalitpur
September is a good time to visit Lalitpur, with days averaging 30.5°C and nights around 22.2°C (mean 26.4°C, close to Lalitpur's yearly average) and higher rainfall. November and February are marginally more temperate, but September still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 30.0°C | 26.5°C | 23.0°C | 31.5°C | 21.3°C | 144 mm | 86% | 1.8 m/s | 4.6 |
| 2024 | 29.8°C | 26.7°C | 23.5°C | 31.7°C | 21.2°C | 221 mm | 88% | 2 m/s | 4.3 |
| 2023 | 30.7°C | 26.9°C | 23.1°C | 32.7°C | 20.6°C | 141 mm | 83% | 2.1 m/s | 4.6 |
| 2022 | 29.8°C | 26.4°C | 23.0°C | 31.5°C | 21.5°C | 269 mm | 86% | 1.9 m/s | 4.4 |
| 2021 | 29.9°C | 26.7°C | 23.6°C | 31.4°C | 22.3°C | 145 mm | 87% | 2.1 m/s | 4.3 |
| 2020 | 32.0°C | 27.6°C | 23.2°C | 34.4°C | 21.2°C | 59 mm | 79% | 1.8 m/s | 4.9 |
| 2019 | 28.9°C | 26.3°C | 23.8°C | 31.2°C | 21.2°C | 329 mm | 91% | 1.8 m/s | 3.8 |
| 2018 | 29.3°C | 25.3°C | 21.4°C | 31.9°C | 19.2°C | 155 mm | 84% | 2.7 m/s | 4.1 |
| 2017 | 32.4°C | 27.5°C | 22.6°C | 36.2°C | 19.3°C | 143 mm | 74% | 1.8 m/s | 5 |
| 2016 | 30.0°C | 26.2°C | 22.4°C | 31.5°C | 20.7°C | 36 mm | 85% | 1.9 m/s | 5.1 |
| 2015 | 30.9°C | 26.2°C | 21.5°C | 32.8°C | 18.1°C | 26 mm | 78% | 2.1 m/s | 5.7 |
| 2014 | 30.4°C | 26.1°C | 21.8°C | 31.6°C | 18.8°C | 152 mm | 83% | 2.4 m/s | 5.3 |
| 2013 | 30.5°C | 26.4°C | 22.4°C | 31.6°C | 20.0°C | 37 mm | 83% | 1.7 m/s | 5.4 |
| 2012 | 30.0°C | 26.1°C | 22.1°C | 32.5°C | 18.2°C | 108 mm | 83% | 1.9 m/s | 5 |
| 2011 | 29.5°C | 25.9°C | 22.3°C | 31.0°C | 18.5°C | 203 mm | 87% | 2.1 m/s | 4.8 |
| 2010 | 29.8°C | 26.1°C | 22.3°C | 31.3°C | 18.1°C | 167 mm | 83% | 1.9 m/s | 5 |
| 2009 | 31.7°C | 26.8°C | 21.9°C | 34.5°C | 19.5°C | 150 mm | 78% | 2.2 m/s | 5.4 |
| 2008 | 30.3°C | 26.2°C | 22.2°C | 32.9°C | 19.3°C | 152 mm | 83% | 1.9 m/s | 5.5 |
| 2007 | 30.3°C | 26.4°C | 22.4°C | 32.1°C | 19.7°C | 156 mm | 82% | 1.7 m/s | 5.1 |
| 2006 | 30.6°C | 26.4°C | 22.2°C | 32.0°C | 19.3°C | 122 mm | 82% | 1.8 m/s | 5.6 |
| 2005 | 30.1°C | 26.4°C | 22.7°C | 33.6°C | 19.6°C | 173 mm | 85% | 2.5 m/s | 4.7 |
| 2004 | 31.1°C | 26.7°C | 22.3°C | 33.1°C | 20.7°C | 54 mm | 79% | 1.6 m/s | 5.6 |
| 2003 | 28.8°C | 25.8°C | 22.8°C | 30.8°C | 20.7°C | 304 mm | 89% | 2 m/s | 3.4 |
| 2002 | 30.4°C | 25.6°C | 20.8°C | 32.7°C | 18.1°C | 101 mm | 79% | 2.1 m/s | 5.6 |
| 2001 | 32.2°C | 26.8°C | 21.4°C | 33.5°C | 19.1°C | 25 mm | 73% | 1.8 m/s | 5.8 |
| 2000 🔥 | 34.1°C | 28.1°C | 22.1°C | 37.1°C | 19.4°C | 54 mm | 68% | 2.2 m/s | 5.3 |
| 1999 | 29.7°C | 26.2°C | 22.6°C | 32.2°C | 20.4°C | 228 mm | 86% | 1.8 m/s | 4 |
| 1998 | 30.9°C | 27.1°C | 23.3°C | 32.7°C | 22.8°C | 146 mm | 83% | 2.1 m/s | 5.3 |
| 1997 | 30.7°C | 26.4°C | 22.1°C | 32.9°C | 19.2°C | 130 mm | 81% | 2.1 m/s | 5 |
| 1996 | 30.3°C | 26.1°C | 21.9°C | 33.4°C | 19.1°C | 128 mm | 82% | 1.7 m/s | 5.3 |
| 1995 | 30.5°C | 26.1°C | 21.6°C | 32.5°C | 18.7°C | 241 mm | 82% | 2.2 m/s | 5.6 |
| 1994 | 29.7°C | 25.3°C | 20.9°C | 30.9°C | 16.6°C | 93 mm | 81% | 2.3 m/s | 5.7 |
| 1993 🌧️ | 29.8°C | 26.2°C | 22.7°C | 31.9°C | 20.7°C | 389 mm | 85% | 2.3 m/s | 4.2 |
| 1992 | 29.5°C | 25.3°C | 21.0°C | 31.7°C | 17.2°C | 131 mm | 81% | 2 m/s | 4.9 |
| 1991 | 30.6°C | 25.9°C | 21.1°C | 32.4°C | 18.2°C | 18 mm | 79% | 2.1 m/s | 5.7 |
| 1990 | 29.0°C | 26.0°C | 23.0°C | 31.0°C | 21.5°C | 370 mm | 89% | 2.3 m/s | 4 |
| 1989 | 31.4°C | 26.8°C | 22.2°C | 33.3°C | 19.6°C | 107 mm | 76% | 2 m/s | 5.6 |
| 1988 | 32.2°C | 27.8°C | 23.3°C | 34.8°C | 21.4°C | 76 mm | 79% | 2.1 m/s | 5.7 |
| 1987 | 31.6°C | 26.7°C | 21.8°C | 33.8°C | 19.3°C | 132 mm | 76% | 2.5 m/s | 5.1 |
| 1986 | 31.2°C | 26.4°C | 21.5°C | 34.0°C | 19.8°C | 64 mm | 76% | 1.9 m/s | 5.8 |
| 1985 | 30.2°C | 25.8°C | 21.4°C | 32.2°C | 18.6°C | 196 mm | 81% | 2.5 m/s | 5.2 |
| 1984 ❄️ | 29.2°C | 25.2°C | 21.1°C | 31.7°C | 18.5°C | 137 mm | 81% | 2.2 m/s | 5.2 |
| 1983 | 29.8°C | 26.5°C | 23.2°C | 32.3°C | 19.2°C | 330 mm | 86% | 1.7 m/s | — |
| 1982 | 30.1°C | 25.7°C | 21.2°C | 32.8°C | 15.7°C | 88 mm | 81% | 2.2 m/s | — |
| 1981 | 31.0°C | 26.7°C | 22.5°C | 33.2°C | 21.4°C | 90 mm | 81% | 2.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 30.5°C with lows near 22.2°C (mean 26.4°C), based on 45 years of NASA POWER data.
September averages 149 mm of rainfall in Lalitpur, a relatively wet time of year. The wettest on record was 389 mm in 1993.
The hottest September reached 37.1°C in 2000. The coldest dipped to 15.7°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.6°C — but days and nights have moved in opposite directions. Overnight lows rose from 21.9°C to 23.2°C while daytime highs eased from 30.1°C to 30°C, narrowing the gap between day and night.
September is close to Lalitpur's year-round average and a relatively wet time of year, so plan for around 30.5°C daytime highs and 22.2°C at night.
Not quite — September is the 7th coolest month in Lalitpur, averaging 26.4°C.
For September in Lalitpur, pack light, breathable clothing and sun protection, with typical highs of 30.5°C and lows of 22.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 82% — quite humid.
Average wind speed in September is 2 m/s. The windiest September on record averaged 2.7 m/s (2018).
The wettest September on record was 1993 with 389 mm. On average, September sees 149 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 Lalitpur 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.
