Weather archive in Ottawa (airport)

To receive explanations, hover over the appropriate heading

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
2025 July 19, Saturday	14	25.7 78	751.5 29.59 1001.92 1001.92	761.8 29.99 1015.65 1015.65	-1.3 -0.05 -1.73 -1.73	47	Wind blowing from the south-west	Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft)			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas				13.0 55	26.3 79	Cumulus humilis or Cumulus fractus other than of bad weather, or both.	50%. 5/10. 4 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.	No Cirrus, Cirrocumulus or Cirrostratus.	24.0 14.9	13.6 56	No precipitation No precipitation	6
	13	25.1 77	752.0 29.61 1002.58 1002.58	762.3 30.01 1016.32 1016.32		47																	13.1 56
	12	24.6 76	752.3 29.62 1002.98 1002.98	762.6 30.02 1016.72 1016.72		46																	12.1 54
	11	23.1 74	752.8 29.64 1003.65 1003.65	763.2 30.05 1017.52 1017.52	-0.7 -0.03 -0.93 -0.93	55	Wind blowing from the south-west	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 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	13.5 56
	10	21.5 71	753.0 29.65 1003.92 1003.92	763.3 30.05 1017.65 1017.65		63																	14.2 58
	09	19.0 66	753.3 29.66 1004.32 1004.32	763.6 30.06 1018.05 1018.05		74																	14.3 58
	08	17.6 64	753.5 29.67 1004.58 1004.58	763.9 30.07 1018.45 1018.45	-0.2 -0.01 -0.27 -0.27	83	Wind blowing from the west-southwest	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas				13.0 55	25.9 79	No Stratocumulus, Stratus, Cumulus or Cumulonimbus.	70 – 80%. 7/10 – 8/10. 6 oktas	2500 or more, or no clouds. 8202 or more, or no clouds.	Altocumulus translucidus in bands, or one or more layers of Altocumulus translucidus or opacus, progressively invading the sky; these Altocumulus clouds generally thicken as a whole.	No Cirrus, Cirrocumulus or Cirrostratus.	24.0 14.9	14.6 58	No precipitation No precipitation	6
	07	15.3 60	753.8 29.68 1004.98 1004.98	764.2 30.09 1018.85 1018.85		100																	15.3 60
	06	13.0 55	753.8 29.68 1004.98 1004.98	764.2 30.09 1018.85 1018.85		100																	13.0 55
	05	13.3 56	753.7 29.67 1004.85 1004.85	764.1 30.08 1018.72 1018.72	-0.1 -0 -0.13 -0.13	100	Wind blowing from the south-southwest	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)			40%. 4/10. 3 oktas								2500 or more, or no clouds. 8202 or more, or no clouds.			24.0 14.9	13.3 56
	04	14.1 57	753.7 29.67 1004.85 1004.85	764.0 30.08 1018.58 1018.58		100																	14.1 57
	03	14.7 58	753.8 29.68 1004.98 1004.98	764.2 30.09 1018.85 1018.85		94																	13.7 57
	02	14.5 58	753.8 29.68 1004.98 1004.98	764.2 30.09 1018.85 1018.85	-0.1 -0 -0.13 -0.13	92	Wind blowing from the west-southwest	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)			no clouds no clouds no clouds				10.2 50	25.9 79						24.0 14.9	13.2 56	No precipitation No precipitation	6
	01	16.1 61	753.9 29.68 1005.12 1005.12	764.2 30.09 1018.85 1018.85		80																	12.7 55
	00	16.7 62	753.8 29.68 1004.98 1004.98	764.2 30.09 1018.85 1018.85		76																	12.5 55
July 18, Friday	23	17.9 64	753.9 29.68 1005.12 1005.12	764.2 30.09 1018.85 1018.85	0.2 0.01 0.27 0.27	71	Wind blowing from the south-southwest	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)			no clouds no clouds no clouds											24.0 14.9	12.5 55
	21	20.4 69	753.7 29.67 1004.85 1004.85	764.0 30.08 1018.58 1018.58		58																	11.7 53
	20	22.4 72	753.7 29.67 1004.85 1004.85	764.0 30.08 1018.58 1018.58	-0.4 -0.02 -0.53 -0.53	47	Wind blowing from the south-west	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)			10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0				10.2 50	25.9 79	No Stratocumulus, Stratus, Cumulus or Cumulonimbus.	no clouds no clouds no clouds	2500 or more, or no clouds. 8202 or more, or no clouds.	No Altocumulus, 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	10.4 51	No precipitation No precipitation	6
	19	24.5 76	753.7 29.67 1004.85 1004.85	764.0 30.08 1018.58 1018.58		39																	9.8 50
	18	25.0 77	753.7 29.67 1004.85 1004.85	764.1 30.08 1018.72 1018.72		35																	8.3 47
	17	25.6 78	754.1 29.69 1005.38 1005.38	764.5 30.1 1019.25 1019.25	-0.3 -0.01 -0.4 -0.4	33	Wind blowing from the west	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft)			40%. 4/10. 3 oktas								2000-2500 6562-8202			24.0 14.9	8.2 47
	16	25.0 77	754.4 29.7 1005.78 1005.78	764.8 30.11 1019.65 1019.65		32																	7.2 45
	15	24.3 76	754.5 29.7 1005.92 1005.92	764.8 30.11 1019.65 1019.65		37																	8.8 48
	14	23.7 75	754.4 29.7 1005.78 1005.78	764.8 30.11 1019.65 1019.65	-0.8 -0.03 -1.07 -1.07	42	Wind blowing from the south-west	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft)			40%. 4/10. 3 oktas				10.2 50	24.3 76	Cumulus humilis or Cumulus fractus other than of bad weather, or both.	40%. 4/10. 3 oktas	1500-2000 4921-6562	No Altocumulus, Altostratus or Nimbostratus.	No Cirrus, Cirrocumulus or Cirrostratus.	24.0 14.9	10.1 50	No precipitation No precipitation	6