Forth, United Kingdom — Weather in September 2026

Climate Overview

Forth, United Kingdom in September has mild conditions, with highs averaging 14.5°C (58°F) and noticeably cooler mornings. Rain falls on about 15 days this month, totalling around 89 mm.

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 16°C (61°F) at the start to 13°C (55°F) by month's end.

September sees fairly even rainfall, totalling about 88 mm across the month.

Expect around 7.0h of sunshine at the start of September, decreasing to 6.0h by the end.

Wind speeds pick up through the month, from 18 km/h (11 mph) to 22 km/h (13 mph).

The warmest days tend to fall around the 6th, averaging 16.8°C (62°F).

Compared to August, this month is about 2°C cooler with 1 fewer rainy days. Temperatures begin dropping heading into October.

Monthly September Averages

Temperature

15°C / 9°C

Feels Like

12°C / 6°C

Rain

15 days · 89 mm

Sunshine

6.8h / day

Humidity

83% — Very Humid

Wind

20 km/h

Wind Direction

SW (219°)

Gusts

42 km/h

Daylight

12.7 h

Cloud Cover

75%

Clear Sky Days

0.5

UV Index

3.3 — Moderate

Dew Point

9°C — Dry

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 06:47

Daylight 12.8h

Sunset 19:36

What to Expect

Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

2 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	5°C / 0°C	1°C / -4°C	14days (92 mm) Wet	3h Poor	90% Very Muggy	0.8 Low	Poor	View Details
February	6°C / 1°C	1°C / -3°C	16days (106 mm) Wet	4.7h Fair	86% Very Muggy	1.2 Low	Poor	View Details
March	7°C / 2°C	3°C / -2°C	15days (84 mm) Wet	6.4h Fair	83% Humid	2.5 Moderate	Poor	View Details
April	10°C / 3°C	6°C / -1°C	11days (57 mm) Wet	8.9h Good	78% Humid	3.9 Moderate	Poor	View Details
May best	14°C / 6°C	11°C / 3°C	13days (68 mm) Wet	10h Excellent	77% Humid	5.1 High	Fair	View Details
June best	16°C / 9°C	14°C / 7°C	15days (86 mm) Wet	10.1h Excellent	78% Humid	5.4 High	Good	View Details
July best	17°C / 11°C	15°C / 9°C	16days (96 mm) Wet	9.1h Good	81% Humid	4.8 Moderate	Fair	View Details
August best	17°C / 11°C	15°C / 9°C	16days (97 mm) Wet	8.6h Good	82% Humid	4.5 Moderate	Fair	View Details
September best	15°C / 9°C	12°C / 6°C	15days (89 mm) Wet	6.8h Fair	83% Humid	3.3 Moderate	Fair	View Details
October	11°C / 6°C	8°C / 3°C	17days (106 mm) Wet	4.7h Fair	87% Very Muggy	1.7 Low	Poor	View Details
November	7°C / 3°C	4°C / -1°C	14days (82 mm) Wet	3.6h Poor	89% Very Muggy	0.9 Low	Poor	View Details
December	6°C / 2°C	2°C / -2°C	16days (104 mm) Wet	2.2h Poor	91% Very Muggy	0.5 Low	Poor	View Details

What to Wear

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Layered clothingLight jacketUmbrellaWaterproof jacketWaterproof shoes

Frequently Asked Questions

Expand all

Is September a good time to visit Forth?

September is typically fair for visiting Forth, with average highs of 15°C (58°F) and around 15 rainy days. Forth, United Kingdom in September has mild conditions, with highs averaging 14.5°C (58°F) and noticeably cooler morning

Does it rain a lot in Forth in September?

Forth typically sees around 15 rainy days in September with 89 mm (3.5 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Forth in September?

Nights in Forth during September are cool at around 9°C (47°F). Bring a jacket or sweater for evenings.

What should I pack for Forth in September?

With highs of 15°C (58°F) and lows of 9°C (47°F) in September, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. Comfortable walking shoes are essential.

Is September among the best months weather-wise in Forth?

Yes, September offers some of the best weather conditions in Forth with comfortable temperatures and lower chances of rain.

What is the UV index in Forth in September?

The average UV index in Forth during September is 3 (moderate). Sunscreen and sunglasses are recommended during midday hours.

How many hours of daylight are there in Forth in September?

Forth gets approximately 13 hours of daylight per day in September, with around 7 hours of sunshine.

Does it snow in Forth in September?

Snow is uncommon in Forth during September based on 10-year climate averages.

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