Best Time to Visit the United Kingdom

Photo by Robert Bye on Unsplash

June and August are the two months worth building a trip around. June hits 24.5°C (76.1°F) by day with only 40.7mm of rain spread across 6 days, and August is close behind at 23.4°C (74.1°F) with just 32.6mm across 7 days — the driest summer month on the record below. The months to plan around instead are November, which saw rain on 15 separate days, and January, which delivered 83.8mm on 13 days with overnight lows of 1.8°C (35.2°F).

All figures on this page are measured 2025 observations for London. They are one year of real data, not a 30-year average, and Scotland, Wales and the north of England run colder and wetter than the numbers here.

The best months: June and August

June is the strongest month in the record on both counts that matter. The daytime high of 24.5°C (76.1°F) is the warmest of the year, and 40.7mm of rain fell on 6 days — meaning roughly 24 days of the month had no rain at all. When rain did arrive it came in meaningful amounts (about 6.8mm per wet day), which is the signature of a passing shower or an evening thunderstorm rather than a grey day that never lifts.

What June does not give you is warm nights. The low is 14.7°C (58.5°F), a swing of nearly 10°C from the daytime peak. That gap is the single most useful thing to know about a British summer: at 2pm you are in a t-shirt in a park, and by 9pm, still in daylight, you want a layer. Restaurants with outdoor tables hand out blankets in June for a reason.

August is the better pick if you want the least interrupted weather. It is a degree cooler than June at 23.4°C (74.1°F), but it recorded the lowest rainfall total of any summer month — 32.6mm on 7 days, averaging under 5mm per wet day. That is drizzle and brief showers, not weather that cancels anything. Nights are similar to June at 14.9°C (58.8°F).

Between the two, June wins on daylight. Late June gives London sunset after 9pm, which functionally adds three hours to every sightseeing day compared with a spring or autumn trip. August trades some of that daylight for slightly more reliable dry weather and a country that is fully in holiday mode — which means better events and worse train prices.

The months to avoid: November, January and December

November is the clearest month to skip. It rained on 15 days — half the month — for a total of 76.5mm. Divide it out and that is about 5.1mm per wet day, which is the worst possible combination: not enough rain to be dramatic, but frequent enough that it is genuinely difficult to plan a day outdoors. The high of 11.7°C (53.1°F) and low of 6.9°C (44.4°F) mean you are cold and damp rather than cold and crisp. Add sunset before 4:30pm and you get roughly seven usable daylight hours, several of which will be wet.

January is the coldest month, with a high of 6.6°C (43.9°F) and a low of 1.8°C (35.2°F), and the wettest of the year at 83.8mm across 13 days. That works out to about 6.4mm per wet day — heavier than November's pattern, so January rain tends to come in defined bursts with clear cold spells in between. Those clear spells are genuinely pleasant if you are dressed for 1.8°C. Frost is likely overnight; sustained snow in London is not, at these temperatures.

December sits between the two: 9.7°C (49.5°F) by day, 5.6°C (42.1°F) at night, 68.1mm of rain on 11 days. It is the mildest of the three winter months and it has Christmas markets, so it is the one worth the tradeoff if you specifically want winter atmosphere. Just do not expect to spend much of it outside by choice.

Shoulder season: May, September, and the surprise of March and April

May is the best value month on the record. It reached 19.9°C (67.8°F) with 27.5mm of rain on 8 days — that is only 3.4mm per wet day, the lightest rain of any month here. Practically: showers you can wait out under a shop awning. Nights of 10.5°C (50.9°F) mean a proper jacket after dark, but daytime is comfortable walking weather with none of the summer crowding at Stonehenge, Edinburgh Castle or the Lake District.

September is the autumn equivalent, at 18.8°C (65.8°F) by day and 11.9°C (53.4°F) at night — but it is measurably wetter, at 61.3mm across 11 days. That is more than double May's rainfall on three more wet days. September still works well; you just need to build rain into the plan rather than hoping around it.

March and April are the outliers in this particular year, and they deserve a caveat. March recorded 12.7mm of rain on just 3 days, and April 23.9mm on 3 days — the two driest months by a wide margin. April also reached 17.5°C (63.5°F), only 2.4°C below May. If those conditions repeated, early spring would be the best-kept secret in British travel. They may not repeat, because spring is the most variable part of the British year. Treat March and April as a genuine opportunity with real downside risk: April's 7.5°C (45.5°F) nights and March's 4.5°C (40.1°F) nights are cold, and you should pack as though the rain will come back.

What each season actually means on the ground

Summer (June, July, August)

Highs of 23.4–24.5°C (74.1–76.1°F) put you in short sleeves during the day, but with lows of 14.7–16.2°C (58.5–61.2°F) you need a light jacket or sweater every single evening. July is the one to watch: at 75.5mm over 9 days it is more than twice as wet as August, and at 8.4mm per wet day the rain arrives as heavy, short-lived downpours. That is a pack-a-compact-umbrella month, not a stay-indoors month. Also worth knowing: most British hotels, trains and Underground lines have no air conditioning, so a 24°C afternoon feels considerably hotter on the Central Line than it does in Hyde Park.

Autumn (September, October, November)

Temperatures fall from 18.8°C (65.8°F) in September to 14.9°C (58.8°F) in October to 11.7°C (53.1°F) in November, while wet days climb from 11 to 9 to 15. October is the interesting middle: 61.7mm over 9 days at nearly 7mm per wet day, which means distinct rainy days rather than constant grey. You are in a waterproof jacket, walking shoes that tolerate puddles, and layers you can shed indoors — pubs and museums are heated hard.

Winter (December, January, February)

Highs of 6.6–9.7°C (43.9–49.5°F) and lows of 1.8–5.6°C (35.2–42.1°F) mean a proper insulated coat, a hat, and waterproof footwear. February is the quiet standout of the three: 49.1mm on 10 days is the second-lowest rainfall total of the year, and the 7.8°C (46.0°F) high is above January's. This is the season for indoor Britain — the British Museum, the National Gallery, the Tate, and long lunches — with the payoff of the lowest flight and hotel prices of the year.

Spring (March, April, May)

The steepest warm-up of the year: 12.7°C (54.9°F) in March, 17.5°C (63.5°F) in April, 19.9°C (67.8°F) in May. Nights lag well behind, from 4.5°C (40.1°F) up to 10.5°C (50.9°F), so the day starts cold and ends cold with a warm middle. Layers do all the work here. This is when gardens, parks and the countryside look their best.

Month-by-month

• January — Coldest and wettest: 6.6°C / 1.8°C (43.9°F / 35.2°F), 83.8mm on 13 days. Cheapest month, museum weather.
• February — Still cold at 7.8°C / 3.1°C (46.0°F / 37.6°F) but noticeably drier: 49.1mm on 10 days.
• March — 12.7°C / 4.5°C (54.9°F / 40.1°F). Exceptionally dry in 2025 at 12.7mm on 3 days. Cold mornings, mild afternoons.
• April — 17.5°C / 7.5°C (63.5°F / 45.5°F), 23.9mm on 3 days. Near-summer daytime warmth without the crowds.
• May — 19.9°C / 10.5°C (67.8°F / 50.9°F), 27.5mm on 8 days. The lightest rain of the year per wet day. Best all-round shoulder month.
• June — Warmest at 24.5°C / 14.7°C (76.1°F / 58.5°F), 40.7mm on 6 days, plus the longest daylight. The peak.
• July — 24.4°C / 16.2°C (75.9°F / 61.2°F) but 75.5mm on 9 days — the wettest summer month, in heavy short bursts.
• August — 23.4°C / 14.9°C (74.1°F / 58.8°F) and only 32.6mm on 7 days. The driest summer month.
• September — 18.8°C / 11.9°C (65.8°F / 53.4°F), 61.3mm on 11 days. Comfortable but distinctly wetter than May.
• October — 14.9°C / 9.9°C (58.8°F / 49.8°F), 61.7mm on 9 days. Jacket weather, best autumn colour.
• November — 11.7°C / 6.9°C (53.1°F / 44.4°F) and rain on 15 days (76.5mm). The month to avoid.
• December — 9.7°C / 5.6°C (49.5°F / 42.1°F), 68.1mm on 11 days. Cold and wet, but Christmas markets earn it back.

FAQ

Does it really rain all the time in the UK?

No — it rains often, but lightly. The worst month in this record, November, had rain on 15 of 30 days totalling 76.5mm, which averages about 5.1mm per wet day. For comparison, tropical destinations routinely deliver 30–50mm in a single afternoon. British rain is frequent, fine and short-lived; the reputation comes from how many days it shows up on, not how much falls. Summer is the exception in character — July's 75.5mm over 9 days works out to around 8.4mm per wet day, which is real, heavy rain that arrives fast and clears.

What is the warmest month in the UK?

June, at 24.5°C (76.1°F), with July effectively tied at 24.4°C (75.9°F). The difference between them is not temperature — it is rain, where June had 40.7mm over 6 days against July's 75.5mm over 9. If you are choosing purely on weather, June is the better of the two.

When is the cheapest time to visit?

January and February, which are also the coldest at 6.6°C and 7.8°C (43.9°F and 46.0°F). February is the smarter of the pair: it is warmer than January and had 49.1mm of rain against January's 83.8mm, for the same off-season prices. If you want low prices with usable weather, May is the compromise — 19.9°C (67.8°F) and the year's lightest rain, before school holidays push flights and hotels up.

Do I need an umbrella or a waterproof jacket?

A waterproof jacket with a hood, in every month. An umbrella is a supplement, not a substitute — British rain frequently arrives with wind that turns umbrellas inside out, and in the wettest months you are dealing with drizzle blowing sideways rather than falling straight down. Waterproof shoes matter more than most visitors expect in autumn and winter: October, November, December and January each recorded 9 to 15 wet days, and you will be walking on soaked pavement most days regardless of whether it is raining at that moment. In June, July and August a packable rain shell is enough, since showers pass quickly.

⚠️ Weather figures are measured 2025 observations for London and are provided for general planning only. Conditions vary year to year and across the UK — always check a current forecast close to your travel dates.