Karuizawa (Nagano): temperature and climate normals

Latest12.8 °COct 9, 2026 20:10 JST

24 h max / min20.1 °C / 6.2 °C

Annual mean (normal)8.6 °Crank 727 of 903

Annual precipitation (normal)1,246.2mmrank 689

Altitude999 m

Last 24 hours

Mean maxMeanMean min

Month	Mean	Max	Min	≥30°C	Min<0°C	Precip.	Sun	Snow
Jan	-3.3 °C	2.3 °C	-8.2 °C	0.0days	30.8days	36.8mm	181.6h	25 cm
Feb	-2.6 °C	3.5 °C	-8.0 °C	0.0days	27.7days	36.8mm	191.8h	28 cm
Mar	1.1 °C	7.8 °C	-4.5 °C	0.0days	27.8days	68.3mm	194.8h	21 cm
Apr	7.0 °C	14.3 °C	0.6 °C	0.0days	13.9days	81.0mm	204.6h	6 cm
May	12.3 °C	19.2 °C	6.3 °C	0.0days	1.9days	108.8mm	198.5h	0 cm
Jun	16.0 °C	21.5 °C	11.8 °C	0.2days	0.0days	154.6mm	144.8h	0 cm
Jul	20.1 °C	25.3 °C	16.4 °C	3.3days	0.0days	191.8mm	138.6h	0 cm
Aug	20.8 °C	26.3 °C	17.1 °C	4.0days	0.0days	141.6mm	162.7h	0 cm
Sep	16.7 °C	21.7 °C	13.0 °C	0.2days	0.0days	193.5mm	126.6h	0 cm
Oct	10.5 °C	16.2 °C	6.3 °C	0.0days	2.0days	151.1mm	140.3h	0 cm
Nov	4.8 °C	11.2 °C	-0.2 °C	0.0days	17.8days	52.5mm	162.5h	1 cm
Dec	-0.5 °C	5.3 °C	-5.3 °C	0.0days	29.3days	29.6mm	171.9h	12 cm
Year	8.6 °C	14.6 °C	3.8 °C	7.7days	151.3days	1,246.2mm	2,022.0h	35 cm

For reference: latest 12.8 °C; the Oct mean normal is 10.5 °C (one observation vs a monthly mean).

Normals: JMA 2020 normals (1991–2020 averages). Latest values are observations fetched once a day, not real time.