Best time to visit Delft

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 (?)
11234555321
On the sunniest 1 in 10 days, UV reaches this — and even higher
377
PM2.5 air quality · on a typical day (?)
1113141010978981011
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
252327171612121316151819
June 8/10 feels 20°C (+3°C vs 1991-2020) · HCI 78/100
Day 21° · Night 13° 63% humidity 20 km/h wind 12 rain days (132h) 275h sun
Thermal 8
Sky 8
Rain 6
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 climatesThe Hague98% · Rotterdam98% · Leiden98%

Other destinations with the most-alike year-round climate to Delft (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 Delft'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 3–7 3 13 173 13.3 82% 25 93 1 Quiet 4
Feb 4–9 5 15 166 11.1 79% 28 106 1 Quiet 4
Mar 4–11 7 14 161 11.5 70% 23 175 2 Quiet 5
Apr 5–13 10 12 143 11.9 63% 22 225 3 Quiet 6
May 9–17 15 13 149 11.5 65% 20 274 4 Quiet 6
Jun 13–21 20 12 132 11.0 63% 20 275 5 Quiet 8
Jul 14–21 20 16 191 11.9 67% 21 266 5 Quiet 7
Aug 15–23 22 13 158 12.2 66% 20 264 5 Peak 7
Sep 13–20 19 12 153 12.8 70% 19 212 3 Moderate 7
Oct 10–16 14 17 197 11.6 78% 23 138 2 Moderate 5
Nov 6–11 8 18 194 10.8 82% 22 97 1 Peak 4
Dec 4–8 4 16 208 13.0 87% 23 64 — Busy 3

UV Index in Delft by Month

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

Best months in detail

June

8/10

13–21°C (feels 20°C) · 12 rain days (132h) · 275 sun hours · 63% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

August

7/10

15–23°C · 13 rain days (158h) · 264 sun hours · 66% humidity · Peak crowd · UV 5 (moderate)

September

7/10

13–20°C · 12 rain days (153h) · 212 sun hours · 70% humidity · Moderate crowd · UV 3 (moderate)

Every month

Show the other 9 months in detail

January

4/10

3–7°C (feels 3°C) · 13 rain days (173h) · 93 sun hours · 82% humidity · Quiet crowd · UV 1 (low)

February

4/10

4–9°C (feels 5°C) · 15 rain days (166h) · 106 sun hours · 79% humidity · Quiet crowd · UV 1 (low)

March

5/10

4–11°C (feels 7°C) · 14 rain days (161h) · 175 sun hours · 70% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)

April

6/10

5–13°C (feels 10°C) · 12 rain days (143h) · 225 sun hours · 63% humidity · Quiet crowd · UV 3 (moderate)

May

6/10

9–17°C (feels 15°C) · 13 rain days (149h) · 274 sun hours · 65% humidity · Quiet crowd · UV 4 (moderate)

July

7/10

14–21°C · 16 rain days (191h) · 266 sun hours · 67% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

October

5/10

10–16°C (feels 14°C) · 17 rain days (197h) · 138 sun hours · 78% humidity · Moderate crowd · UV 2 (low)

November

4/10

6–11°C (feels 8°C) · 18 rain days (194h) · 97 sun hours · 82% humidity · Peak crowd · UV 1 (low)

December

3/10

4–8°C (feels 4°C) · 16 rain days (208h) · 64 sun hours · 87% humidity · Busy crowd

Frequently asked questions about visiting Delft

When is the best time to visit Delft?

June is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 13–21°C (12 rainy days). The top three months by score are June, August, September.

What is the worst time to visit Delft?

December is the lowest-scoring month (3/10). Typical conditions: 4–8°C (16 rainy days).

When are crowds lowest in Delft?

Search-interest seasonality (Google Trends 2021-2025) is lowest in March and peaks in November. 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 Delft have good weather but fewer tourists?

June (climate 8/10, crowd index 17) and July (climate 7/10, crowd index 20) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.

What is the UV index in Delft 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 5, Aug 5, Sep 3, Oct 2, Nov 1, Dec —.

What is the UV index in Delft in June?

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

How high can UV get in Delft 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, June, July. Plan sun protection for the worst case, not the average.

Is air quality in Delft bad for travelers?

PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 8 months: January, February, March, April, May, September, November, December. The worst month is March with a typical-day mean of 14 µg/m³ (moderate); on the worst 10% of days PM2.5 reaches 27 µg/m³ (unhealthy) 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.