Hertfordshire Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Hertfordshire, the United Kingdom in September.

Thinking about venturing to Hertfordshire, the United Kingdom this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Hertfordshire in September

Hertfordshire, the United Kingdom is a region in the United Kingdom. September in Hertfordshire generally has pleasant temperatures, with moderate precipitation.

Temperatures

You can expect pleasant maximum daytime temperatures of around 20°C (68°F) and nighttime temperatures around 11°C (52°F) in Bishops Stortford.

For a closer look at conditions across Hertfordshire, the United Kingdom, refer to the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Potters Bar with an average of 54 mm (2.1 in) to moderate rainfall in Tring with 59 mm (2.3 in).

Average sunshine

Sunshine is moderately available across various locations. In Bishops Stortford, you can expect around 146 hours of sunlight in September, which gives a pleasant combination of sun and shade. For those who want maximum sunshine, our weather planner can point you toward the sunniest places on Earth.

Explore Hertfordshire by month

Pick a month to see the average temperature, rainfall and sunshine in Hertfordshire — and find the best time to visit. (based on Bishops Stortford)

Best Places to Visit in Hertfordshire in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Hertfordshire.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Hertfordshire

What is the weather like in September for some of the most popular destinations in Hertfordshire, the United Kingdom?

Temperature range in Hertfordshire (September)

Precipitation variation in Hertfordshire (September)

Bishops Stortford

In September Bishops Stortford generally has pleasant temperatures with maximum daytime temperatures around 20°C (68°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
23°C (73°F)
20°C (68°F)
16°C (61°F)
Min temperature
13°C (55°F)
11°C (52°F)
8°C (46°F)
Monthly sun hours
205 hours
146 hours
112 hours
Monthly rainfall
68 mm (2.7 in)
55 mm (2.2 in)
61 mm (2.4 in)
Monthly rainy days
12 days
12 days
14 days
Weather conditions

Watford

In September Watford generally has pleasant temperatures with maximum daytime temperatures around 20°C (68°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
22°C (72°F)
20°C (68°F)
16°C (61°F)
Min temperature
13°C (55°F)
11°C (52°F)
8°C (46°F)
Monthly sun hours
204 hours
155 hours
113 hours
Monthly rainfall
68 mm (2.7 in)
56 mm (2.2 in)
64 mm (2.5 in)
Monthly rainy days
12 days
12 days
14 days
Weather conditions

Saint Albans

In September Saint Albans generally has pleasant temperatures with maximum daytime temperatures around 20°C (68°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
22°C (72°F)
20°C (68°F)
15°C (59°F)
Min temperature
13°C (55°F)
11°C (52°F)
8°C (46°F)
Monthly sun hours
204 hours
155 hours
113 hours
Monthly rainfall
68 mm (2.7 in)
57 mm (2.2 in)
64 mm (2.5 in)
Monthly rainy days
12 days
12 days
14 days
Weather conditions

Stevenage

In September Stevenage generally has pleasant temperatures with maximum daytime temperatures around 20°C (68°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
23°C (73°F)
20°C (68°F)
16°C (61°F)
Min temperature
13°C (55°F)
11°C (52°F)
8°C (46°F)
Monthly sun hours
183 hours
141 hours
115 hours
Monthly rainfall
68 mm (2.7 in)
56 mm (2.2 in)
61 mm (2.4 in)
Monthly rainy days
12 days
12 days
14 days
Weather conditions

Hemel Hempstead

In September Hemel Hempstead generally has pleasant temperatures with maximum daytime temperatures around 20°C (68°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
22°C (72°F)
20°C (68°F)
15°C (59°F)
Min temperature
13°C (55°F)
11°C (52°F)
8°C (46°F)
Monthly sun hours
204 hours
155 hours
113 hours
Monthly rainfall
68 mm (2.7 in)
58 mm (2.3 in)
65 mm (2.6 in)
Monthly rainy days
13 days
12 days
15 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Hertfordshire, in the United Kingdom.

Popular cities in September

Day & night temperatures, rainfall and average weather in Hertfordshire in September.

City Weather Day temp Night temp Rainfall
Bishops Stortford 20°C (68°F) 11°C (52°F) 55 mm (2.2 in)
Watford 20°C (68°F) 11°C (52°F) 56 mm (2.2 in)
Saint Albans 20°C (68°F) 11°C (52°F) 57 mm (2.2 in)
Stevenage 20°C (68°F) 11°C (52°F) 56 mm (2.2 in)
Hemel Hempstead 20°C (68°F) 11°C (52°F) 58 mm (2.3 in)
Hertford 20°C (68°F) 11°C (52°F) 57 mm (2.2 in)

Hertfordshire weather in September: frequently asked questions

What is the weather like in Hertfordshire, the United Kingdom in September?

September in Hertfordshire, the United Kingdom brings perfect weather. In Bishops Stortford, daytime temperatures are typically around 20°C (68°F) and nighttime lows hover near 11°C (52°F).

What is the average temperature in Hertfordshire, the United Kingdom in September?

In Bishops Stortford, the average daytime high in September is 20°C (68°F), while nighttime temperatures drop to around 11°C (52°F).

Does Hertfordshire, the United Kingdom get a lot of rain in September?

Rain is generally moderate to light in Hertfordshire, the United Kingdom during September, with Bishops Stortford averaging close to 55 mm (2.2 in).

Is September a Good Time to Visit Hertfordshire, the United Kingdom?

We consider September to be one of the best times to travel to Hertfordshire, the United Kingdom. Typically, the climate in Bishops Stortford is perfect. However, the weather conditions may vary depending on your destination.

Generally speaking, the best visiting conditions can be found in June, July, August and September offering mostly perfect weather in Bishops Stortford. The weather in January, February and December, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Hertfordshire.

Weather and climate has detailed information for every country in the world. Are you going to the United Kingdom? Get detailed historical weather averages for many cities in the United Kingdom.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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