Slovenia · 1991–2020

Best time to visit
Trebnje.

June leads for comfortable weather in Trebnje: typically 25.5°C by day, 13.7°C at night, with 103 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high25.5°C

Typical low13.7°C

Rain in June103 mm

Comfort

June

June · July · August

78climate match

Beach

July

July · August · June

61climate match

Outdoors

May

May · September · April

74climate match

The weakest month is January, scoring 5 against June’s 78 — days reach only 4.6°C, 19° 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

54.6° / -2.4°

Feb

67.3° / -1.9°

Mar

3012.3° / 1.5°

Apr

4817.2° / 5.6°

May

6721.6° / 9.8°

Jun

7825.5° / 13.7°

Jul

7427.5° / 15.2°

Aug

7327.2° / 15.1°

Sep

6621.6° / 11.1°

Oct

4316.2° / 7.2°

Nov

1510° / 3.2°

Dec

54.8° / -1.6°

Monthly climate evidence for Trebnje — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.6°C	-2.4°C	55 mm	7	9 h 01	5	Strong coverage
February	7.3°C	-1.9°C	72 mm	7	10 h 17	6	Strong coverage
March	12.3°C	1.5°C	62 mm	7.2	11 h 45	30	Strong coverage
April	17.2°C	5.6°C	85 mm	9.3	13 h 28	48	Strong coverage
May	21.6°C	9.8°C	106 mm	10	14 h 55	67	Strong coverage
June	25.5°C	13.7°C	103 mm	9.3	15 h 43	78	Strong coverage
July	27.5°C	15.2°C	101 mm	9	15 h 24	74	Strong coverage
August	27.2°C	15.1°C	117 mm	8	14 h 08	73	Strong coverage
September	21.6°C	11.1°C	130 mm	9.4	12 h 29	66	Strong coverage
October	16.2°C	7.2°C	120 mm	8.5	10 h 50	43	Strong coverage
November	10°C	3.2°C	115 mm	9.7	9 h 23	15	Strong coverage
December	4.8°C	-1.6°C	82 mm	8.5	8 h 40	5	Strong coverage

What has changed

Trebnje runs +2.4°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

+2.4

Feb

+2.3

Mar

+2.2

Apr

+3.0

May

+1.2

Jun

+3.6

Jul

+2.9

Aug

+3.4

Sep

+1.5

Oct

+2.0

Nov

+2.6

Dec

+2.0

June daytime highs, 2011–2023. Last recorded: 26.8°C.

Records at NOVO MESTO, 1973–2023
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.1°C7 Jan 2001	-23.5°C8 Jan 1985	38 mm9 Jan 2018	184 mm2023 · driest 2 mm in 1989	51
February	22.2°C26 Feb 2021	-22.5°C13 Feb 1985	59 mm2 Feb 2018	201 mm2016 · driest 1 mm in 1998	51
March	25.8°C29 Mar 1989	-17.2°C2 Mar 2005	48 mm22 Mar 1988	157 mm1985 · driest 3 mm in 2012	51
April	29.0°C23 Apr 2018	-6.0°C7 Apr 2021	53 mm29 Apr 1992	228 mm2002 · driest 6 mm in 2007	51
May	32.6°C27 May 2008	-2.8°C1 May 1976	71 mm20 May 1999	193 mm1991 · driest 32 mm in 2003	51
June	35.3°C29 Jun 2021	1.9°C2 Jun 1977	70 mm12 Jun 1994	243 mm1986 · driest 3 mm in 2017	51
July	37.8°C23 Jul 2022	6.1°C4 Jul 1984	75 mm31 Jul 1985	222 mm1975 · driest 15 mm in 2013	51
August	39.9°C8 Aug 2013	3.9°C25 Aug 1980	92 mm9 Aug 1984	273 mm2005 · driest 14 mm in 2000	51
September	33.1°C1 Sep 2015	-1.0°C29 Sep 1977	82 mm18 Sep 2010	297 mm2017 · driest 24 mm in 1985	51
October	27.1°C2 Oct 1985	-6.6°C30 Oct 1997	75 mm8 Oct 1980	335 mm1992 · driest 17 mm in 1995	50
November	25.7°C1 Nov 2022	-15.1°C24 Nov 1988	103 mm10 Nov 1979	237 mm2013 · driest 3 mm in 2011	50
December	19.5°C17 Dec 1989	-17.3°C9 Dec 1980	59 mm18 Dec 1982	191 mm1982 · driest 1 mm in 2016	50

Typical days per month at NOVO MESTO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	23	2
February	0	0	20	3
March	0	0	11	2
April	2	0	2	3
May	8	<1	0	4
June	17	5	0	3
July	23	9	0	4
August	22	9	0	4
September	7	<1	0	4
October	<1	0	2	4
November	0	0	8	4
December	0	0	20	3

The best month has moved. On the 1961–1990 numbers the strongest month here was July (scoring 82); on 2011–2025 it is June (82). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in NOVO MESTO’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%	22%	6%	25%	0.4–7.6°C
February	<1%	26%	8%	32%	2.8–11.3°C
March	7%	25%	8%	27%	8.2–15.4°C
April	22%	32%	10%	40%	13.8–18.7°C
May	47%	34%	12%	44%	19.0–23.3°C
June	62%	34%	13%	42%	22.3–27.3°C
July	69%	30%	11%	35%	24.9–29.2°C
August	71%	27%	12%	31%	23.7–29.3°C
September	52%	30%	14%	37%	19.4–23.7°C
October	18%	28%	13%	33%	13.6–18.6°C
November	1%	31%	13%	40%	6.1–12.1°C
December	0%	28%	9%	32%	2.2–7.7°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.

1973Each stripe is one year’s mean temperature against the 50-year average. Warmest: 2022. Coolest: 1978.2022

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3188886
NOAA station: SIE00115126 · NOVO MESTO
Station distance: 18 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 45.90°, 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 NOVO MESTO is what differs

Novo Mesto→Straža→Šentjernej→Mirna→Žužemberk→Mirna Peč→

Or put two places side by side: Trebnje vs Novo Mesto

Best time to visitTrebnje.

June

July

May

The whole year,without the guesswork.

Trebnje runs +2.4°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Trebnje.

The whole year,
without the guesswork.

Trebnje runs +2.4°C
on the 1961–1990 baseline.

Nearby, measured,
and named.