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Germany · 1991–2020

Best time to visit
Hellenthal.

July leads for comfortable weather in Hellenthal: typically 21.6°C by day, 11.9°C at night, with 68 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high21.6°C

Typical low11.9°C

Rain in July68 mm

Comfort

July

July · August · June

75climate match

Beach

July

July · August · June

38climate match

Outdoors

June

June · August · July

84climate match

The weakest month is January, scoring 5 against July’s 75 — days reach only 3.3°C, 21° 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

53.3° / -1.4°

Feb

54.2° / -1.4°

Mar

107.9° / 0.7°

Apr

3212.3° / 3.1°

May

4816.2° / 6.6°

Jun

6519.4° / 9.7°

Jul

7521.6° / 11.9°

Aug

7421.4° / 11.6°

Sep

5717.2° / 8.8°

Oct

3512.4° / 5.8°

Nov

107.3° / 2.2°

Dec

54.1° / -0.4°

Monthly climate evidence for Hellenthal — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.3°C	-1.4°C	75 mm	12.3	8 h 27	5	Strong coverage
February	4.2°C	-1.4°C	63 mm	11.1	9 h 57	5	Strong coverage
March	7.9°C	0.7°C	60 mm	11.3	11 h 42	10	Strong coverage
April	12.3°C	3.1°C	48 mm	9.3	13 h 43	32	Strong coverage
May	16.2°C	6.6°C	64 mm	10.4	15 h 26	48	Strong coverage
June	19.4°C	9.7°C	64 mm	10.1	16 h 25	65	Strong coverage
July	21.6°C	11.9°C	68 mm	11	16 h 02	75	Strong coverage
August	21.4°C	11.6°C	66 mm	10	14 h 31	74	Strong coverage
September	17.2°C	8.8°C	63 mm	9.3	12 h 33	57	Strong coverage
October	12.4°C	5.8°C	60 mm	10.5	10 h 37	35	Strong coverage
November	7.3°C	2.2°C	62 mm	11.8	8 h 54	10	Strong coverage
December	4.1°C	-0.4°C	77 mm	12.6	8 h 01	5	Strong coverage

What has changed

Hellenthal 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

+1.3

Feb

+1.6

Mar

+2.4

Apr

+2.5

May

+1.7

Jun

+2.4

Jul

+2.0

Aug

+2.1

Sep

+1.2

Oct

+0.7

Nov

+1.5

Dec

+2.2

July daytime highs, 2011–2025. Last recorded: 22.2°C.

Records at KALL-SISTIG, 1947–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	14.5°C29 Jan 1949	-20.0°C19 Jan 1963	43 mm22 Jan 1995	235 mm1995 · driest 6 mm in 1996	79
February	19.4°C27 Feb 2019	-21.0°C1 Feb 1956	56 mm6 Feb 1984	179 mm1990 · driest 2 mm in 1959	79
March	22.9°C31 Mar 2021	-17.2°C6 Mar 1971	32 mm2 Mar 1956	171 mm1988 · driest 8 mm in 2014	79
April	26.5°C18 Apr 1949	-11.5°C12 Apr 1986	36 mm17 Apr 2009	130 mm1989 · driest 1 mm in 2007	79
May	31.0°C25 May 1953	-3.3°C8 May 1957	64 mm30 May 2016	176 mm2024 · driest 16 mm in 2001	79
June	36.5°C27 Jun 2026	0.0°C1 Jun 1975	57 mm4 Jun 2021	168 mm1966 · driest 9 mm in 1962	79
July	36.8°C25 Jul 2019	2.0°C1 Jul 1984	145 mm14 Jul 2021	236 mm2021 · driest 10 mm in 2018	78
August	36.0°C12 Aug 2003	3.0°C28 Aug 1978	64 mm20 Aug 1969	217 mm1969 · driest 12 mm in 1947	79
September	30.9°C15 Sep 2020	-0.5°C26 Sep 1972	83 mm27 Sep 2007	160 mm1984 · driest 5 mm in 1959	79
October	25.0°C10 Oct 1979	-6.3°C27 Oct 1950	51 mm7 Oct 1982	178 mm1998 · driest 6 mm in 1969	78
November	19.5°C1 Nov 2014	-12.7°C20 Nov 1971	47 mm22 Nov 1984	161 mm1952 · driest 2 mm in 2011	78
December	14.0°C4 Dec 1953	-18.0°C31 Dec 1978	58 mm27 Dec 1947	274 mm1993 · driest 10 mm in 2016	79

Typical days per month at KALL-SISTIG, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	18	2
February	0	0	16	2
March	0	0	13	1
April	0	0	7	1
May	1	0	1	2
June	4	<1	0	2
July	8	2	0	2
August	6	1	0	2
September	2	0	0	2
October	0	0	2	2
November	0	0	9	1
December	0	0	17	2

The best month has moved. On the 1961–1990 numbers the strongest month here was July (scoring 73); on 2011–2025 it is August (83). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in KALL-SISTIG’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%	42%	7%	55%	0.3–5.4°C
February	0%	40%	6%	52%	0.2–7.2°C
March	<1%	38%	5%	50%	4.3–10.8°C
April	5%	37%	4%	48%	8.9–14.3°C
May	16%	36%	6%	49%	12.8–17.9°C
June	29%	36%	6%	48%	16.9–21.7°C
July	39%	35%	7%	45%	17.7–23.5°C
August	40%	33%	7%	43%	18.2–23.0°C
September	21%	32%	6%	40%	14.8–20.2°C
October	5%	33%	5%	44%	10.5–14.7°C
November	0%	41%	6%	55%	4.5–9.4°C
December	0%	42%	7%	58%	1.2–6.1°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.

1948Each stripe is one year’s mean temperature against the 76-year average. Warmest: 2022. Coolest: 1962.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2906843
NOAA station: GME00124366 · KALL-SISTIG
Station distance: 7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 50.48°, 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 KALL-SISTIG is what differs

Mechernich→Schleiden→Kall→Blankenheim→Nettersheim→Dahlem→

Or put two places side by side: Hellenthal vs Mechernich

Best time to visitHellenthal.

July

July

June

The whole year,without the guesswork.

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

Nearby, measured,and named.

Best time to visit
Hellenthal.

The whole year,
without the guesswork.

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

Nearby, measured,
and named.