Hertfordshire, United Kingdom Weather

  1. Hertfordshire, United Kingdom Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in Hertfordshire over the next 12 hours
  7. Temperature and possibility of rain in Hertfordshire in the coming days
  8. Rainfall in Hertfordshire in the coming days
  9. Hertfordshire Weather Summary
  10. Weather averages by month
  11. Hertfordshire's weather
  12. Frequently asked questions
  13. Comments
Hertfordshire, Weather
(Photo by Viktor Forgacs on Unsplash)

Current conditions

Updated:
20°C
68.0°F
°C °F

Condition: Clear Sky

Pressure: 1,016 hPa

Feel like: 18 °C

Temperature: 20°C

Cloud: 0%

Humidity: 42%

Wind: NW - 7 km/h

Visibility: 28.02 km

Weather forecast

Tue
22 Sep
11°C / 19°C
Slight Rain
Wed
23 Sep
8°C / 16°C
Overcast
Thu
24 Sep
12°C / 18°C
Moderate Drizzle
Fri
25 Sep
9°C / 16°C
Overcast
Sat
26 Sep
12°C / 20°C
Moderate Drizzle
Hourly forecast today:
17:00 PM
6° / 20°
6° / 20°
Clear Sky
42% 14 km/h
18:00 PM
8° / 15°
8° / 15°
Clear Sky
61% 10 km/h
19:00 PM
11° / 14°
11° / 14°
Partly Cloudy
86% 3 km/h
20:00 PM
10° / 13°
10° / 13°
Clear Sky
82% 3 km/h
21:00 PM
11° / 13°
11° / 13°
Clear Sky
88% 2 km/h
22:00 PM
8° / 11°
8° / 11°
Clear Sky
84% 4 km/h
23:00 PM
8° / 10°
8° / 10°
Clear Sky
89% 1 km/h
00:00 AM
7° / 9°
7° / 9°
Clear Sky
88% 3 km/h
01:00 AM
8° / 11°
8° / 11°
Mainly Clear
83% 4 km/h
02:00 AM
7° / 12°
7° / 12°
Clear Sky
74% 7 km/h
03:00 AM
8° / 12°
8° / 12°
Partly Cloudy
77% 6 km/h

30 Day Averages and Extremes

  • Average high 18.37°C
  • Average low 10.6°C
  • Hottest day 25°C (29 September 2026)
  • Coldest day 0°C (04 October 2026)
  • Average humidity 70.53%
  • Days with precipitation 23 days
  • Highest precipitation 68 mm (12 September 2026)

Yesterday's Data

  • Max: 21°C
  • Min: 4°C
  • Total Precipitation: 0 mm

Temperature and possibility of rain in Hertfordshire over the next 12 hours

Temperature and possibility of rain in Hertfordshire in the coming days

Rainfall in Hertfordshire in the coming days

Hertfordshire Climate Summary

Hertfordshire features a Marine west coast, warm summer (Köppen classification: Cfb), with an average annual temperature of 11.29ºC (52.32ºF), which is about 0.54% higher than the national average for United Kingdom. Annually, the city experiences approximately 41.36 millimeters (1.63 inches) of rainfall, spread across 115.11 rainy days, accounting for 31.54% of the year.

Longitude 51.8097823
Latitude -0.2376744
Yearly high temperature 13.7ºC (56.66ºF)
Yearly low temperature 6.9ºC (44.42ºF)
Hottest month July 21.6ºC (70.88ºF)
Coldest month December 2.99ºC (37.38ºF)
Yearly precip 41.36mm (1.63in)
Days with rainfall 115.11 days (31.54%)
Driest month March (82.39%)
Wettest month June (81.55%)

Weather averages by month

Month High / Low (°C) Rain
January 6.18° / 1.75° 9.64 days
February 7.14° / 2.01° 8.82 days
March 10.09° / 3.04° 7.55 days
April 13.46° / 4.8° 8.91 days
May 15.92° / 7.22° 10.18 days
June 18.87° / 10.19° 11.91 days
July 21.6° / 12.73° 11.73 days
August 21.14° / 13.33° 11.82 days
September 18.66° / 10.99° 6.18 days
October 14.43° / 8.57° 10.0 days
November 9.78° / 5.15° 8.82 days
December 7.16° / 2.99° 9.55 days

Hertfordshire's weather

Frequently asked questions

1. What is the hottest month in Hertfordshire?

July has the highest average monthly temperature (daily mean of 21.6ºC) and December are the coolest (daily mean of 2.99ºC).

2. What should I wear in Hertfordshire today?

For today's warm weather in Hertfordshire, with temperatures between 19ºC to 22ºC (66.2ºF to 71.6ºF), you might consider wearing:
- Sunglasses
- Cotton or linen fabrics
- Shorts or lightweight trousers
- Light, breathable socks

Temperature

Early
2°C / 4°C
Morning
3°C / 15°C
Afternoon
5°C / 21°C
Evening
11°C / 13°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 438
  • CO 191
  • NH3 2
  • NO2 7
  • O3 75
  • PM10 9
  • PM25 5
  • SO2 0
  • CH4 1,397

Sunrise / Sunset

05:46
17:59