Monthly climate guide
Luton weather in September
Expect mild weather in Luton in September: afternoons reach about 19°C (67°F), while nights drop to around 9°C (49°F). Around 46 mm of rain falls over the month (fairly dry), and skies are often cloudy. Daytime highs are 2°C cooler than August and 4°C warmer than October.
What stands out in September
- Just 130 km apart, but Luton runs about 2°C warmer than Nottingham this month.
- It cools down fast from here: October is about 4°C cooler.
- Seasonally, September counts as early autumn in Luton.
- Skies are at their clearest this time of year.
Avg high
19°C
67°F
Avg low
9°C
49°F
Rainfall
46 mm
fairly dry
Humidity
81%
relative
Sky
65%
cloud · often cloudy
Luton weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 7°C / 44°F | 1°C / 34°F | 61 mm | 94% | 73% |
| February | 8°C / 46°F | 1°C / 34°F | 50 mm | 90% | 73% |
| March | 10°C / 51°F | 2°C / 36°F | 48 mm | 86% | 71% |
| April | 14°C / 57°F | 4°C / 39°F | 44 mm | 81% | 66% |
| May | 17°C / 62°F | 7°C / 44°F | 54 mm | 79% | 69% |
| June | 20°C / 67°F | 10°C / 50°F | 68 mm | 79% | 72% |
| July | 22°C / 72°F | 12°C / 54°F | 59 mm | 76% | 67% |
| August | 22°C / 71°F | 12°C / 53°F | 68 mm | 77% | 72% |
| September | 19°C / 67°F | 9°C / 49°F | 46 mm | 81% | 65% |
| October | 15°C / 59°F | 7°C / 45°F | 74 mm | 88% | 72% |
| November | 10°C / 50°F | 4°C / 40°F | 70 mm | 93% | 74% |
| December | 8°C / 46°F | 3°C / 38°F | 77 mm | 95% | 75% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A small travel umbrella, just in case
Is September a good time to visit Luton?
Compare the months in the chart above to find your ideal window.
Best time to visit Luton →Other United Kingdom cities in September
Cite or embed this data
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Luton weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/uk/luton/september
<a href="https://weathercompare.eu/weather/uk/luton/september">Luton weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/uk/luton" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Luton weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/uk/luton/september">Luton weather in September</a> – WeatherCompare</p>
Luton in September: quick answers
Is September a good time to visit Luton?
Yes. September is one of the best months for Luton, with highs around 19°C and about 46 mm of rain.
How warm is Luton in September?
Average highs are about 19°C (67°F) and average lows about 9°C (49°F), based on 10 years of daily data.
Does it rain a lot in Luton in September?
Luton typically gets around 46 mm of rain in September — fairly dry.
Figures are long-term averages for the area around Luton (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.