6) Weather Conditions & Climate
Micro and macro climate have huge impact on your honey production.
The micro climate is localised weather such as the rain in your area or sunshine or black frost and ice for a few days. All of which will put pressure on the colony over short spans of time.
The macro climate is more regional, and even national, such as the El Nino, droughts, floods and extended periods of above and below the respective average temperature ranges such as heat waves and cold fronts.
At times, especially when colonies are on a crop or orchard, this can be a double-edge sword as the poor climate condition can cause chaos with both the bees and the source of the pollen and nectar they are foraging upon. For example, a serious hail storm can destroy a crop or badly damage it when in flower. The bees would have less to forage on and the farmer's crop yield is likely to decline dramatically.
With regards to mobile and static hives, we will discuss in a point below, some of the weather factors may be managed by you moving your hives to a new location. Either way, when bad weather takes place locally, the bees suffer. If there's a lot of rain over the flowering period where the apiary is the bees cannot forage. They simply won't and cannot fly much in the rain nor the cold weather.
Water and Heat
Keep in mind that water washes away nectar and pollen. Some time is lost due to the wash-away effect whenever it rains. This influences the total foraging capacity on any crop in the area.
Heat has multiple impact factors too. It puts massive pressure on the internal climate control of the hive itself. More bees, that could be foraging, now need to provide cooling duties inside the hive keeping the brood and comb from overheating.
Bees can heat up or cool their internal climate. Their micro climate of the hive. Firstly, bees eat honey or nectar for energy. Secondly, they heat the hive by huddling and clustering together, vibrating their wing muscles. This generates heat! They also use this technique in defense against pests and attackers. Hive beetles and hornets are also killed in this manner. Even the queen can be 'cooked' by the workers in a 'revolt' in a practice called 'balling'.
They can also, in a few days, build propolis walls, like a trellis, that keeps control over the flow of cold air into the hive making it easier to keep warm. This also helps defenders keep pests at bay while the propolis also acts as a anti-microbial 'welcome mat' for returning foragers. Propolis is also the bee cement or glue that is used to make the internal space air tight.
When it's hot, bees use moisture to cool the colony down. They will bring water into the hive and use it to help cool the temperature as well as the moisture from unripe nectar which starts off at about 80% and gets reduced over time to an average of about 18% - but ranges from as low as 16% and as high as 24% depending on your location and the type of nectar. The workers then fan the moisture around the colony dispersing the heat like an air conditioner.
How does this impact honey production?
All of the above requires energy. This leads to:
Good management, with high quality bee hives that help with insulation, has a vast effect on your result over a season.
Let's move on to the effect cold has.