The Netherlands · 1991–2020

Best time to visit
Bilthoven.

July leads for comfortable weather in Bilthoven: typically 23.1°C by day, 13°C at night, with 85 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high23.1°C

Typical low13°C

Rain in July85 mm

Comfort

July

July · August · June

79climate match

Beach

July

July · August · June

43climate match

Outdoors

September

September · June · May

82climate match

The weakest month is January, scoring 5 against July’s 79 — days reach only 6.1°C, 18° below the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

56.1° / 0.9°

Feb

77° / 0.7°

Mar

2310.5° / 2.4°

Apr

4514.8° / 4.5°

May

6018.3° / 8°

Jun

7120.9° / 10.8°

Jul

7923.1° / 13°

Aug

7722.9° / 12.5°

Sep

6319.5° / 10°

Oct

4114.8° / 7.1°

Nov

189.9° / 3.9°

Dec

56.7° / 1.6°

Monthly climate evidence for Bilthoven — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	6.1°C	0.9°C	71 mm	12.6	8 h 13	5	Strong coverage
February	7°C	0.7°C	63 mm	11	9 h 49	7	Strong coverage
March	10.5°C	2.4°C	58 mm	10.2	11 h 41	23	Strong coverage
April	14.8°C	4.5°C	42 mm	8.4	13 h 49	45	Strong coverage
May	18.3°C	8°C	59 mm	9.3	15 h 40	60	Strong coverage
June	20.9°C	10.8°C	71 mm	10	16 h 43	71	Strong coverage
July	23.1°C	13°C	85 mm	10.7	16 h 18	79	Strong coverage
August	22.9°C	12.5°C	84 mm	11.4	14 h 40	77	Strong coverage
September	19.5°C	10°C	78 mm	10.3	12 h 35	63	Strong coverage
October	14.8°C	7.1°C	81 mm	11.5	10 h 32	41	Strong coverage
November	9.9°C	3.9°C	80 mm	13	8 h 41	18	Strong coverage
December	6.7°C	1.6°C	84 mm	13.6	7 h 45	5	Strong coverage

What has changed

Bilthoven runs +1.8°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+2.0

Feb

+2.1

Mar

+2.3

Apr

+2.4

May

+1.5

Jun

+1.9

Jul

+1.6

Aug

+1.6

Sep

+1.5

Oct

+1.1

Nov

+1.7

Dec

+2.4

July daytime highs, 2011–2025. Last recorded: 24.0°C.

Records at DE BILT, 1901–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.6°C1 Jan 2023	-24.8°C27 Jan 1942	40 mm16 Jan 1918	142 mm2023 · driest 4 mm in 1997	126
February	18.9°C26 Feb 2019	-21.6°C16 Feb 1956	54 mm8 Feb 1946	172 mm1946 · driest 0 mm in 1986	126
March	23.9°C29 Mar 1968	-14.4°C4 Mar 2005	39 mm22 Mar 1946	139 mm1914 · driest 2 mm in 2025	126
April	28.9°C15 Apr 2007	-6.6°C12 Apr 1986	34 mm24 Apr 2014	108 mm1965 · driest 0 mm in 2007	126
May	32.9°C24 May 1922	-3.8°C4 May 1929	55 mm7 May 1931	140 mm2024 · driest 6 mm in 1989	126
June	36.8°C26 Jun 2026	0.2°C2 Jun 1975	53 mm6 Jun 1943	181 mm1998 · driest 12 mm in 2018	126
July	37.5°C25 Jul 2019	2.8°C3 Jul 1907	61 mm19 Jul 1966	192 mm1930 · driest 5 mm in 2018	125
August	35.3°C4 Aug 1990	3.8°C31 Aug 1956	62 mm1 Aug 1917	221 mm1912 · driest 6 mm in 1991	125
September	33.5°C5 Sep 1949	-0.7°C16 Sep 1971	53 mm10 Sep 2024	213 mm1957 · driest 3 mm in 1959	125
October	26.5°C4 Oct 1983	-7.8°C28 Oct 1931	64 mm13 Oct 2013	220 mm2023 · driest 6 mm in 1953	125
November	19.3°C2 Nov 2020	-14.4°C29 Nov 1921	46 mm27 Nov 1983	183 mm1944 · driest 11 mm in 2011	125
December	15.9°C31 Dec 2022	-16.6°C31 Dec 1923	39 mm31 Dec 2017	190 mm1965 · driest 0 mm in 1905	125

Typical days per month at DE BILT, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	12	2
February	0	0	12	2
March	0	0	9	2
April	<1	0	4	<1
May	4	<1	<1	2
June	5	<1	0	2
July	9	2	0	3
August	8	2	0	3
September	2	<1	0	3
October	<1	0	1	3
November	0	0	5	2
December	0	0	12	3

The best month has moved. On the 1961–1990 numbers the strongest month here was July (scoring 81); on 2011–2025 it is August (88). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in DE BILT’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	41%	5%	55%	2.0–7.8°C
February	0%	36%	4%	47%	3.0–9.1°C
March	<1%	33%	4%	43%	6.8–12.2°C
April	7%	32%	3%	42%	10.8–15.7°C
May	24%	31%	5%	41%	15.1–19.6°C
June	37%	34%	6%	43%	18.1–22.3°C
July	49%	34%	8%	45%	19.5–24.0°C
August	49%	37%	8%	49%	19.5–24.0°C
September	28%	35%	7%	45%	17.0–20.9°C
October	4%	36%	7%	48%	12.2–16.2°C
November	0%	42%	7%	57%	6.7–10.8°C
December	0%	43%	6%	58%	2.7–8.1°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1901Each stripe is one year’s mean temperature against the 125-year average. Warmest: 2024. Coolest: 1963.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2758927
NOAA station: NLM00006260 · DE BILT
Station distance: 3.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 52.13°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from DE BILT is what differs

Utrecht→Nieuwegein→Zeist→Leidsche Rijn→Maarssen→De Meern→

Or put two places side by side: Bilthoven vs Utrecht

Best time to visitBilthoven.

July

July

September

The whole year,without the guesswork.

Bilthoven runs +1.8°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Bilthoven.

The whole year,
without the guesswork.

Bilthoven runs +1.8°C
on the 1961–1990 baseline.

Nearby, measured,
and named.