China · 1991–2020

Best time to visit
Lanzhou.

May leads for comfortable weather in Lanzhou: typically 24.6°C by day, 10.9°C at night, with 37 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high24.6°C

Typical low10.9°C

Rain in May37 mm

Comfort

May

May · September · June

89climate match

Beach

June

June · July · August

76climate match

Outdoors

April

April · May · September

93climate match

The weakest month is January, scoring 5 against May’s 89 — days reach only 1.8°C, 22° below the 24°C the score treats as ideal, and nights drop to -9.8°C.

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

51.8° / -9.8°

Feb

77° / -5.4°

Mar

3813.2° / 0.5°

Apr

7120.1° / 6.1°

May

8924.6° / 10.9°

Jun

8228.1° / 14.7°

Jul

6929.8° / 17°

Aug

7628.4° / 16.1°

Sep

8923.5° / 11.7°

Oct

5716.9° / 5.1°

Nov

2310° / -2°

Dec

53.3° / -8.1°

Monthly climate evidence for Lanzhou — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	1.8°C	-9.8°C	2 mm	0.8	9 h 57	5	Good coverage
February	7°C	-5.4°C	2 mm	1	10 h 49	7	Good coverage
March	13.2°C	0.5°C	7 mm	2.2	11 h 51	38	Good coverage
April	20.1°C	6.1°C	13 mm	3.1	13 h 03	71	Good coverage
May	24.6°C	10.9°C	37 mm	4.8	14 h 03	89	Good coverage
June	28.1°C	14.7°C	45 mm	5.4	14 h 36	82	Good coverage
July	29.8°C	17°C	67 mm	7.4	14 h 23	69	Good coverage
August	28.4°C	16.1°C	62 mm	7.3	13 h 31	76	Good coverage
September	23.5°C	11.7°C	37 mm	6.2	12 h 22	89	Good coverage
October	16.9°C	5.1°C	22 mm	4.4	11 h 12	57	Good coverage
November	10°C	-2°C	2 mm	0.6	10 h 12	23	Good coverage
December	3.3°C	-8.1°C	0 mm	0.1	9 h 43	5	Good coverage

Records at LANZHOU, 1951–2008
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.1°C7 Jan 1979	-22.0°C6 Jan 2006	4 mm30 Jan 1991	9 mm2008 · driest 0 mm in 1992	58
February	21.0°C5 Feb 1993	-19.5°C2 Feb 2004	5 mm5 Feb 1974	9 mm1974 · driest 0 mm in 1997	58
March	28.4°C29 Mar 2003	-16.3°C2 Mar 1951	15 mm28 Mar 1967	23 mm1996 · driest 0 mm in 1962	58
April	34.6°C30 Apr 1994	-8.6°C4 Apr 1969	30 mm17 Apr 1970	68 mm1970 · driest 1 mm in 1993	58
May	34.7°C7 May 1981	-1.2°C4 May 2004	45 mm25 May 1985	126 mm2002 · driest 1 mm in 1981	58
June	36.8°C29 Jun 1988	4.6°C6 Jun 2004	47 mm26 Jun 1986	109 mm1986 · driest 7 mm in 2004	58
July	39.8°C24 Jul 2000	7.6°C11 Jul 2006	50 mm15 Jul 1999	142 mm1979 · driest 9 mm in 2002	58
August	38.3°C10 Aug 1953	5.4°C26 Aug 1952	97 mm7 Aug 1978	236 mm1959 · driest 7 mm in 1963	58
September	34.4°C7 Sep 1997	0.4°C30 Sep 1960	40 mm6 Sep 1955	100 mm1955 · driest 9 mm in 1956	58
October	27.6°C8 Oct 1951	-7.1°C28 Oct 1986	31 mm4 Oct 2000	60 mm1961 · driest 0 mm in 1997	58
November	20.3°C9 Nov 1987	-16.5°C25 Nov 2004	14 mm5 Nov 1977	21 mm1977 · driest 0 mm in 1988	58
December	16.2°C1 Dec 1968	-22.8°C31 Dec 2004	5 mm7 Dec 1975	9 mm1954 · driest 0 mm in 1960	58

Typical days per month at LANZHOU, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	31	0
February	0	0	26	0
March	<1	0	13	<1
April	5	<1	2	<1
May	17	3	<1	1
June	25	10	0	1
July	27	17	0	2
August	26	11	0	2
September	11	1	0	1
October	<1	0	3	<1
November	0	0	22	0
December	0	0	31	0

How often, not how much — every day in LANZHOU’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%	2%	0%	<1%	-0.5–3.6°C
February	<1%	3%	0%	<1%	2.9–9.0°C
March	8%	7%	<1%	3%	10.3–14.8°C
April	45%	11%	1%	6%	17.0–21.3°C
May	74%	16%	4%	11%	22.5–26.0°C
June	80%	19%	4%	16%	26.1–29.2°C
July	74%	25%	7%	28%	27.9–31.1°C
August	75%	25%	8%	26%	26.2–29.8°C
September	64%	22%	5%	21%	20.5–24.5°C
October	21%	14%	2%	8%	15.0–18.5°C
November	<1%	3%	<1%	<1%	7.5–11.1°C
December	0%	1%	0%	<1%	0.2–4.3°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.

1951Each stripe is one year’s mean temperature against the 58-year average. Warmest: 1998. Coolest: 2005.2008

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 1804430
NOAA station: CHM00052889 · LANZHOU
Station distance: 4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 36.06°, 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 LANZHOU is what differs

Zhongpuzi→Xindian→Xincheng→Xiaguanying→Tulongchuan→Tangwangchuan→

Or put two places side by side: Lanzhou vs Zhongpuzi

Best time to visitLanzhou.

May

June

April

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Lanzhou.

The whole year,
without the guesswork.

Nearby, measured,
and named.