Isotherms for Months of Year

Contained within the 1st Edition (1906) of the Atlas of Canada is a plate that shows isothermal lines for each month of the year. Within the plate there are 12 maps, one for each month that varies from January to December. These lines are drawn at intervals of 5 degrees Fahrenheit connect the points having the same mean temperature. They are deduced from observations by the Meteorological Service extending over a series of years.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 22:11 (UTC)
Created	April 17, 2026, 22:11 (UTC)
contact_email	geoinfo@nrcan.gc.ca
contact_person	{}
criticality_level	[]
data_dictionary	["climatology_meterology_atmosphere"]
geographic_scope	[]
open_canada_collection	geogratis
open_canada_date_published	1906-06-30 00:00:00
open_canada_keywords	{"fr": ["archives climatologiques", "climat", "données météorologiques", "météorologie", "temps - météorologie"], "en": ["climate", "climate archives", "meteorological data", "meteorology", "weather"]}
open_canada_subject	["nature_and_environment", "science_and_technology"]
sensitivity_level	unrestricted
title_fr	Isothermes des mois de l'année
update_frequency	as_needed