Best time to visit Windsor

Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
I'm comfortable up to 27°C feels-like
22° heat-averse 30° heat-loving

Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.

Saved to this browser. Changes update the strips below.
Recent · 2020-2024
Interest Google Trends 2021-2025 searches, not arrivals (?)
Day · avg daily high (?)
Night · avg overnight low (?)
UV index · On a typical day around midday, UV is about this (?)
11234544321
On the sunniest 1 in 10 days, UV reaches this — and even higher
36766
PM2.5 air quality · on a typical day (?)
1010121097678899
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
18172418151271014121517
August 9/10 feels 22°C (+2°C vs 1991-2020) · HCI 85/100
Day 22° · Night 14° 60% humidity 20 km/h wind 9 rain days (103h) 234h sun
Thermal 9
Sky 9
Rain 7
Wind 10

Higher = better, including rain & wind (green = "doesn't hurt the score", not "lots of it").

How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.

Compare with another destination

Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.

Similar climatesLondon99% · Oxford97% · Cambridge97%

Other destinations with the most-alike year-round climate to Windsor (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Windsor's. Based on the 2020-2024 climatology, not this year's actual weather.

Month-by-month

Month Temp °C Feels °C Rain days Rain h Rain h/day Humidity Wind km/h Sun h UV Interest Score
Jan 2–8 4 11 116 10.5 83% 22 101 1 Quiet 4
Feb 4–10 6 12 131 10.9 77% 26 100 1 Quiet 4
Mar 4–11 8 14 160 11.4 70% 23 152 2 Quiet 5
Apr 5–14 11 9 102 11.3 59% 21 217 3 Quiet 7
May 8–17 15 11 137 12.5 61% 20 250 4 Quiet 7
Jun 11–21 19 11 120 10.9 58% 19 266 5 Quiet 8
Jul 13–22 21 13 146 11.2 59% 20 261 4 Quiet 8
Aug 14–22 22 9 103 11.4 60% 20 234 4 Peak 9
Sep 12–20 19 12 117 9.8 65% 19 190 3 Peak 8
Oct 9–16 14 16 159 9.9 76% 21 146 2 Moderate 6
Nov 5–11 8 11 119 10.8 82% 21 103 1 Busy 5
Dec 4–9 5 13 137 10.5 86% 22 70 — Moderate 4

UV Index in Windsor by Month

UV index in Windsor peaks at 5 (moderate) in June, dropping to 0 (low) in December.

Best months in detail

August

9/10

14–22°C · 9 rain days (103h) · 234 sun hours · 60% humidity · Peak crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (moderate)

June

8/10

11–21°C (feels 19°C) · 11 rain days (120h) · 266 sun hours · 58% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

September

8/10

12–20°C (feels 19°C) · 12 rain days (117h) · 190 sun hours · 65% humidity · Peak crowd · UV 3 (moderate)

Every month

Show the other 9 months in detail

January

4/10

2–8°C (feels 4°C) · 11 rain days (116h) · 101 sun hours · 83% humidity · Quiet crowd · UV 1 (low)

February

4/10

4–10°C (feels 6°C) · 12 rain days (131h) · 100 sun hours · 77% humidity · Quiet crowd · UV 1 (low)

March

5/10

4–11°C (feels 8°C) · 14 rain days (160h) · 152 sun hours · 70% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)

April

7/10

5–14°C (feels 11°C) · 9 rain days (102h) · 217 sun hours · 59% humidity · Quiet crowd · UV 3 (moderate)

May

7/10

8–17°C (feels 15°C) · 11 rain days (137h) · 250 sun hours · 61% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (moderate)

July

8/10

13–22°C (feels 21°C) · 13 rain days (146h) · 261 sun hours · 59% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (high)

October

6/10

9–16°C (feels 14°C) · 16 rain days (159h) · 146 sun hours · 76% humidity · Moderate crowd · UV 2 (low)

November

5/10

5–11°C (feels 8°C) · 11 rain days (119h) · 103 sun hours · 82% humidity · Busy crowd · UV 1 (low)

December

4/10

4–9°C (feels 5°C) · 13 rain days (137h) · 70 sun hours · 86% humidity · Moderate crowd

Frequently asked questions about visiting Windsor

When is the best time to visit Windsor?

August is the highest-scoring month (9/10 on the Holiday Climate Index). Typical conditions: 14–22°C (9 rainy days). The top three months by score are August, June, September.

What is the worst time to visit Windsor?

December is the lowest-scoring month (4/10). Typical conditions: 4–9°C (13 rainy days).

When are crowds lowest in Windsor?

Search-interest seasonality (Google Trends 2021-2025) is lowest in January and peaks in August. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.

Which months in Windsor have good weather but fewer tourists?

June (climate 8/10, crowd index 24) and July (climate 8/10, crowd index 38) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.

What is the UV index in Windsor by month?

UV peaks at 5 (moderate) in June and is lowest in December at 0 (low). Monthly peak values: Jan 1, Feb 1, Mar 2, Apr 3, May 4, Jun 5, Jul 4, Aug 4, Sep 3, Oct 2, Nov 1, Dec —.

What is the UV index in Windsor in June?

June is the peak UV month in Windsor, with a daily-peak UV index of 5 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.

How high can UV get in Windsor on the sunniest days?

Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. June is the worst case: typical days average UV 5 (moderate), but the top 10% of days reach UV 7 (high) — and even higher. Months where the sunniest days routinely exceed the typical reading: March, May, June, July, August. Plan sun protection for the worst case, not the average.

Is air quality in Windsor bad for travelers?

PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 5 months: January, February, March, April, December. The worst month is March with a typical-day mean of 12 µg/m³ (moderate); on the worst 10% of days PM2.5 reaches 24 µg/m³ (unhealthy for sensitive) and higher. People with asthma, heart conditions, or sensitive children may want to avoid these months or limit outdoor activity. Source: CAMS via Open-Meteo.