Weather archive in Ottawa (airport)

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Date / Local time		T	Po	P	Pa	U	DD	Ff	ff10	ff3	N	WW	W1	W2	Tn	Tx	Cl	Nh	H	Cm	Ch	VV	Td	RRR	tR	E	Tg	E'	sss
2026 July 21, Tuesday	20	19.8 68	739.6 29.12 986.05 986.05	749.7 29.52 999.52 999.52	-0.8 -0.03 -1.07 -1.07	95	Wind blowing from the south-east	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	State of sky on the whole unchanged.	Thunderstorm(s) with or without precipitation.	Shower(s).	15.9 61	24.4 76	Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	600-1000 1968-3281	Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus.	No Cirrus, Cirrocumulus or Cirrostratus.	24.0 14.9	18.9 66	17.0 0.67	6
	17	19.0 66	740.4 29.15 987.12 987.12	750.6 29.55 1000.72 1000.72	-1.4 -0.06 -1.87 -1.87	91	Wind blowing from the east-southeast	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas								1000-1500 3281-4921			24.0 14.9	17.4 63
	14	21.5 71	741.8 29.2 988.99 988.99	752.0 29.61 1002.58 1002.58	0.6 0.02 0.8 0.8	86	Wind blowing from the south-southwest	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft)			100%. 10/10. 8 oktas	Thunderstorm, slight or moderate, without hail, but with rain and/or snow at time of observation.	Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period.	Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period.	15.9 61	24.4 76	Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus, Stratus or pannus.	70 – 80%. 7/10 – 8/10. 6 oktas	1000-1500 3281-4921	Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus.		9.0 5.6	19.0 66	0.5 0.02	6
	11	23.5 74	741.2 29.18 988.19 988.19	751.3 29.58 1001.65 1001.65	-2.7 -0.11 -3.6 -3.6	67	Wind blowing from the south-southeast	Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft)			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas								2500 or more, or no clouds. 8202 or more, or no clouds.			24.0 14.9	17.1 63
	08	19.6 67	743.9 29.29 991.79 991.79	754.1 29.69 1005.38 1005.38	-0.6 -0.02 -0.8 -0.8	73	Wind blowing from the south	Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas				15.9 61	26.2 79	No Stratocumulus, Stratus, Cumulus or Cumulonimbus.	50%. 5/10. 4 oktas	2500 or more, or no clouds. 8202 or more, or no clouds.	Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus.	Cirrus spissatus, in patches or entangled sheaves, which usually do not increase and sometimes seem to be the remains of the upper part of a Cumulonimbus; or Cirrus castellanus or floccus.	24.0 14.9	14.6 58	No precipitation No precipitation	6
	05	16.1 61	744.5 29.31 992.59 992.59	754.7 29.71 1006.18 1006.18	-1.6 -0.06 -2.13 -2.13	82	Wind blowing from the south-east	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas								2500 or more, or no clouds. 8202 or more, or no clouds.			24.0 14.9	13.0 55
	02	17.9 64	746.1 29.37 994.72 994.72	756.3 29.78 1008.32 1008.32	-0.9 -0.04 -1.2 -1.2	71	Wind blowing from the south-southeast	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)			100%. 10/10. 8 oktas				12.3 54	26.2 79	Stratocumulus other than Stratocumulus cumulogenitus.	70 – 80%. 7/10 – 8/10. 6 oktas	1500-2000 4921-6562	Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus.		24.0 14.9	12.5 55	No precipitation No precipitation	6
July 20, Monday	23	18.2 65	747.0 29.41 995.92 995.92	757.2 29.81 1009.52 1009.52	-0.8 -0.03 -1.07 -1.07	70	Wind blowing from the south	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas								2500 or more, or no clouds. 8202 or more, or no clouds.			24.0 14.9	12.7 55
July 20, Monday	20	21.4 71	747.8 29.44 996.98 996.98	758.1 29.85 1010.72 1010.72	-0.7 -0.03 -0.93 -0.93	60	Wind blowing from the south	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas				12.3 54	26.2 79	No Stratocumulus, Stratus, Cumulus or Cumulonimbus.	40%. 4/10. 3 oktas	2500 or more, or no clouds. 8202 or more, or no clouds.	Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus.	Cirrocumulus alone, or Cirrocumulus accompanied by Cirrus or Cirrostratus or both, but Cirrocumulus is predominant.	24.0 14.9	13.4 56	No precipitation No precipitation	6