Creating emphasis 
Policy moved to Wikivoyage:Creating emphasis
Use of Pronouns 
Policy moved to Wikivoyage:Use of pronouns
Avoid long lists 
Policy moved to Wikivoyage:Avoid long lists
Presenting climate information 
Nutshell: Provide basic climate information about the destination. It helps to travel light by bringing only the things one needs, and to travel comfortably by bringing the right things.
It would be great if the weather was always perfect when we go travelling, but alas, some times of the year are better to visit a destination than others. To give travellers an idea of what to expect, it's good to provide some basic climate information. When is it generally hot/cold or wet/dry? Are there any temperature extremes and how to deal with it? Is it foggy for days on end at certain times of the year? When is it hurricane/monsoon/typhoon season? Keep the description concise and objective and please no rants about how a week of rain ruined your dream beach holiday!
The climate box 
|Daily highs (°C)||5||7||9||11||14||17||20||20||17||13||9||6|
|Nightly lows (°C)||0||2||4||5||8||11||13||13||10||7||4||1|
Sample climate box for City X
To help present basic temperature and precipitation information about a destination, use the Climate template. It generates a climate information box that presents the temperature and precipitation information that you provide. The template accepts either Imperial or Metric units, depending on what you set its units parameter to. It also has a text box at the bottom for descriptive text about climate and or links to forecast sites. Examples of the template in use can be found at Bangkok, Chicago, London and Vancouver.
Climate data sources 
Public domain 
- National Park Service  — The National Park Service (NPS) provides detailed descriptions of the climates for many U.S. National Parks and Monuments. Simply click on the national park in question, then click on the "Plan your visit" page. Typically, there will be a "Things To Know Before You Come" link, click on it. Now, on the Things To Know Before You Come page click on the "Weather" link, if there is one. Not all parks/monuments provide this information, but a lot do. See the weather page for Glacier National Park . Typically descriptions can be copied verbatim, however, some copyediting may be required.
- National Oceanic and Atmospheric Administration  — NOAA collects all kinds of useful data, but NOAA's scope is essentially limited to U.S. locales, however, you can find information for non-US places that have a strategic partnership with NOAA. NOAA has amazingly useful data tables  to which will allow you to search for averages for particular cities throughout the U.S.
- Weatherbase, worldwide climate data, searchable by city, nicely presented.
- World Climate, worldwide climate data, searchable by city.